yarn argument value identified as a package

In the example [here](https://stackoverflow.com/a/51508426/839513), the `100000` is indentified as a package, but it is not:

```
yarn add <yourPackage> --network-timeout 100000
```

- [ ] Fix it
- [ ] Add it to the `src/content/registry/npm.test.js` tests
- [ ] Add the link (https://stackoverflow.com/a/51508426/839513) to the `tests/real-examples/real-examples.yaml` collection.