Containers created with `docker compose` cannot be updated

**Describe the bug**
Using `docker compose` under Windows 10 with Docker in WSL2 leads to wrong image name being used, thus watchtower can't check for updates properly.

**To Reproduce**
1. Create a "regular" docker-compose.yml with some containers and add watchtower
2. Execute `docker compose up` (**no hyphen!**)
3. ❌ Watchtower can't find the images (looking for the wrong name, see log for details)
6. Exit the above command and execute `docker compose down`
4. Execute `docker-compose up` (**with hyphen!**)
5. ✔️ Everything works as expected
6. Exit the above command and execute `docker-compose down`

**Expected behavior**
Both `docker-compose up` and `docker compose up` should work the same way.

**Logs**
Below are extracts of the log file of both runs.

Using **docker compose**:
```text
watchtower-ghcr_1       | time="2021-07-08T12:24:49Z" level=debug msg="Making sure everything is sane before starting"
watchtower-ghcr_1       | time="2021-07-08T12:24:49Z" level=debug msg="Retrieving running containers"
watchtower-ghcr_1       | time="2021-07-08T12:24:49Z" level=debug msg="There are no additional watchtower containers"
watchtower-ghcr_1       | time="2021-07-08T12:24:49Z" level=debug msg="Watchtower HTTP API skipped."
watchtower-ghcr_1       | time="2021-07-08T12:24:49Z" level=info msg="Watchtower 1.3.0\nUsing no notifications\nOnly checking containers in scope \"ghcr\"\nScheduling first run: 2021-07-08 12:25:19 +0000 UTC\nNote that the first check will be performed in 29 seconds"
watchtower-ghcr_1       | time="2021-07-08T12:25:19Z" level=debug msg="Checking containers for updated images"
watchtower-ghcr_1       | time="2021-07-08T12:25:19Z" level=debug msg="Retrieving running containers"
watchtower-ghcr_1       | time="2021-07-08T12:25:19Z" level=debug msg="Trying to load authentication credentials." container=/weblate-docker-compose_weblate_1 image="sha256:e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8"
watchtower-ghcr_1       | time="2021-07-08T12:25:19Z" level=debug msg="Loaded auth credentials for user UncleSamSwiss on registry sha256:e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8"
watchtower-ghcr_1       | time="2021-07-08T12:25:19Z" level=debug msg="Got image name: sha256:e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8"
watchtower-ghcr_1       | time="2021-07-08T12:25:19Z" level=debug msg="Credentials loaded"
watchtower-ghcr_1       | time="2021-07-08T12:25:19Z" level=debug msg="Checking if pull is needed" container=/weblate-docker-compose_weblate_1 image="sha256:e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8"
watchtower-ghcr_1       | time="2021-07-08T12:25:19Z" level=debug msg="Building challenge URL" URL="https://index.docker.io/v2/"
watchtower-ghcr_1       | time="2021-07-08T12:25:19Z" level=debug msg="Got response to challenge request" header="Bearer realm=\"https://auth.docker.io/token\",service=\"registry.docker.io\"" status="401 Unauthorized"
watchtower-ghcr_1       | time="2021-07-08T12:25:19Z" level=debug msg="Checking challenge header content" realm="https://auth.docker.io/token" service=registry.docker.io
watchtower-ghcr_1       | time="2021-07-08T12:25:19Z" level=debug msg="Setting scope for auth token" image=sha256 scope="repository:library/sha256:pull"
watchtower-ghcr_1       | time="2021-07-08T12:25:19Z" level=debug msg="Credentials found."
watchtower-ghcr_1       | time="2021-07-08T12:25:22Z" level=debug msg="Parsing image ref" host=index.docker.io image=sha256 normalized="docker.io/library/sha256:e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8" tag=e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8
watchtower-ghcr_1       | time="2021-07-08T12:25:22Z" level=debug msg="Doing a HEAD request to fetch a digest" url="https://index.docker.io/v2/library/sha256/manifests/e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8"
watchtower-ghcr_1       | time="2021-07-08T12:25:22Z" level=warning msg="Could not do a head request for \"sha256:e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8\", falling back to regular pull." container=/weblate-docker-compose_weblate_1 image="sha256:e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8"
watchtower-ghcr_1       | time="2021-07-08T12:25:22Z" level=warning msg="Reason: registry responded to head request with \"401 Unauthorized\", auth: \"Bearer realm=\\\"https://auth.docker.io/token\\\",service=\\\"registry.docker.io\\\",scope=\\\"repository:library/sha256:pull\\\"\"" container=/weblate-docker-compose_weblate_1 image="sha256:e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8"
watchtower-ghcr_1       | time="2021-07-08T12:25:22Z" level=debug msg="Pulling image" container=/weblate-docker-compose_weblate_1 image="sha256:e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8"
watchtower-ghcr_1       | time="2021-07-08T12:25:27Z" level=debug msg="Error pulling image sha256:e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8, Error response from daemon: Head https://registry-1.docker.io/v2/library/sha256/manifests/e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8: unauthorized: incorrect username or password"
watchtower-ghcr_1       | time="2021-07-08T12:25:27Z" level=info msg="Unable to update container \"/weblate-docker-compose_weblate_1\": Error response from daemon: Head https://registry-1.docker.io/v2/library/sha256/manifests/e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8: unauthorized: incorrect username or password. Proceeding to next."
watchtower-ghcr_1       | time="2021-07-08T12:25:27Z" level=debug msg="Session done: 1 scanned, 0 updated, 1 failed"
watchtower-ghcr_1       | time="2021-07-08T12:25:27Z" level=debug msg="Scheduled next run: 2021-07-08 12:25:49 +0000 UTC"
```

Using **docker-compose**:
```text
watchtower-ghcr_1       | time="2021-07-08T12:44:55Z" level=debug msg=ghcr
watchtower-ghcr_1       | time="2021-07-08T12:44:55Z" level=debug msg="Sleeping for a second to ensure the docker api client has been properly initialized."
watchtower-ghcr_1       | time="2021-07-08T12:44:56Z" level=debug msg="Making sure everything is sane before starting"
watchtower-ghcr_1       | time="2021-07-08T12:44:56Z" level=debug msg="Retrieving running containers"
watchtower-ghcr_1       | time="2021-07-08T12:44:56Z" level=debug msg="There are no additional watchtower containers"
watchtower-ghcr_1       | time="2021-07-08T12:44:56Z" level=debug msg="Watchtower HTTP API skipped."
watchtower-ghcr_1       | time="2021-07-08T12:44:56Z" level=info msg="Watchtower 1.3.0\nUsing no notifications\nOnly checking containers in scope \"ghcr\"\nScheduling first run: 2021-07-08 12:45:26 +0000 UTC\nNote that the first check will be performed in 29 seconds"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Checking containers for updated images"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Retrieving running containers"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Trying to load authentication credentials." container=/weblate-docker-compose_weblate_1 image="ghcr.io/iobrokertranslator/weblate:master"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Loaded auth credentials for user UncleSamSwiss on registry ghcr.io/iobrokertranslator/weblate:master"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Got image name: ghcr.io/iobrokertranslator/weblate:master"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Credentials loaded"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Checking if pull is needed" container=/weblate-docker-compose_weblate_1 image="ghcr.io/iobrokertranslator/weblate:master"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Building challenge URL" URL="https://ghcr.io/v2/"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Got response to challenge request" header="Bearer realm=\"https://ghcr.io/token\",service=\"ghcr.io\",scope=\"repository:user/image:pull\"" status="401 Unauthorized"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Checking challenge header content" realm="https://ghcr.io/token" service=ghcr.io
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Setting scope for auth token" image=ghcr.io/iobrokertranslator/weblate scope="repository:ghcr.io/iobrokertranslator/weblate:pull"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Credentials found."
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Parsing image ref" host=ghcr.io image=iobrokertranslator/weblate normalized="ghcr.io/iobrokertranslator/weblate:master" 
tag=master
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Doing a HEAD request to fetch a digest" url="https://ghcr.io/v2/iobrokertranslator/weblate/manifests/master"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Found a remote digest to compare with" remote="sha256:a3082489de4a3bd2690cdb2efd27f83ec76e716db9832eb0fc202664dcb3b2a5"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg=Comparing local="sha256:a3082489de4a3bd2690cdb2efd27f83ec76e716db9832eb0fc202664dcb3b2a5" remote="sha256:a3082489de4a3bd2690cdb2efd27f83ec76e716db9832eb0fc202664dcb3b2a5"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Found a match"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="No pull needed. Skipping image."
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="No new images found for /weblate-docker-compose_weblate_1"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Session done: 1 scanned, 0 updated, 0 failed"
watchtower-ghcr_1       | time="2021-07-08T12:45:26Z" level=debug msg="Scheduled next run: 2021-07-08 12:45:56 +0000 UTC"
```

Main differences:
```diff
  level=debug msg="Checking containers for updated images"
  level=debug msg="Retrieving running containers"
- level=debug msg="Trying to load authentication credentials." container=/weblate-docker-compose_weblate_1 image="sha256:e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8"
+ level=debug msg="Trying to load authentication credentials." container=/weblate-docker-compose_weblate_1 image="ghcr.io/iobrokertranslator/weblate:master"
- level=debug msg="Loaded auth credentials for user UncleSamSwiss on registry sha256:e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8"
+ level=debug msg="Loaded auth credentials for user UncleSamSwiss on registry ghcr.io/iobrokertranslator/weblate:master"
- level=debug msg="Got image name: sha256:e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8"
+ level=debug msg="Got image name: ghcr.io/iobrokertranslator/weblate:master"
  level=debug msg="Credentials loaded"
- level=debug msg="Checking if pull is needed" container=/weblate-docker-compose_weblate_1 image="sha256:e2dff46bca7b31539a043a3a42c714a21873d99ab92b9a865370479fd83122d8"
+ level=debug msg="Checking if pull is needed" container=/weblate-docker-compose_weblate_1 image="ghcr.io/iobrokertranslator/weblate:master"
- level=debug msg="Building challenge URL" URL="https://index.docker.io/v2/"
+ level=debug msg="Building challenge URL" URL="https://ghcr.io/v2/"
```

**Environment**
- Windows 10 Pro
- x64
- Docker version 20.10.7, build f0df350 (WSL2 backend)
- docker-compose version 1.29.2, build 5becea4c

**Additional context**
My docker-compose.yml
```yml
version: "3"
services:
  weblate:
    image: ghcr.io/iobrokertranslator/weblate:master
    volumes:
      - weblate-data:/app/data
    env_file:
      - ./environment
    restart: unless-stopped
    depends_on:
      - database
      - cache
    labels:
      com.centurylinklabs.watchtower.scope: "ghcr"
  database:
    image: postgres:12-alpine
    env_file:
      - ./environment
    volumes:
      - postgres-data:/var/lib/postgresql/data
    restart: unless-stopped
  cache:
    image: redis:6-alpine
    restart: unless-stopped
    command: ["redis-server", "--appendonly", "yes"]
    volumes:
      - redis-data:/data
  watchtower-ghcr:
    image: containrrr/watchtower
    restart: unless-stopped
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    command: --debug --cleanup --interval 30 --stop-timeout 30s --scope ghcr
volumes:
  weblate-data: {}
  postgres-data: {}
  redis-data: {}
```
Of course you need a docker-compose.override.yml, but I can't provide it here for obvious reasons (credentials).

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Containers created with `docker compose` cannot be updated #1019

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Containers created with docker compose cannot be updated #1019

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Containers created with `docker compose` cannot be updated #1019