fix: github action ref doesn't checkout that ref

[rohun-apex]

Problem

The below code block will checkout ansible-lint at main. Proof: Using ansible-lint ref: main will show up in the GHA (see "Was" section of verification below). Expected: it should checkout ansible-lint at v25.8.2.

  jobs:
  build:
    name: Ansible Lint
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Run ansible-lint
        uses: ansible/[email protected]

Explanation

This is believed to be because of a long-standing bug for github variables in a composite action (see below linked issues), which this action.yml seems to be. Given that root bug hasn't been fixed since 2023, it effectively becomes a bug manifested in ansible-lint.

• Composite actions have empty values for important environment variables: GITHUB_ACTION_REF and GITHUB_ACTION_REPOSITORY actions/runner#2525
• github.action_repository and github.action_ref are empty in run for composite actions actions/runner#2473

Following a similar example to actions/runner#2525 , I have renamed that variable so it gets around the bug in GHAs.

Verification

Was:

1. GHA will checkout main despite specifying the tag to use (see top line of image).

Is:

1. GHA will checkout the tag that is referenced (top line ref specified matches bottom ref it will check out).