Describe the bug
I've separated repeating shell logic to its own composite action. On each run, I'm setting a label into GITHUB_ENV to re-use it down the line. It works the first time, but subsequent calls to the composite action can't seem to update that value, as mentioned in the docs. After trying to set it, it just keeps the old value.

To Reproduce
Steps to reproduce the behavior:

1. Setup a composite action
2. Add step run: echo "label=${{ inputs.label }}-$GITHUB_SHA" >> $GITHUB_ENV
3. Call this action multiple times in your job with different labels

Expected behavior
The environment variable should be updated properly on every call.

Runner Version and Platform

Version of your runner? Where do I see that?

OS of the machine running the runner? ubuntu-latest

What's not working?

There is no output whatsoever