Use GITHUB_WORKFLOW_REF instead of _workflow_version input

Automatically determines the workflow reference from GITHUB_WORKFLOW_REF
instead of requiring manual _workflow_version input parameter.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: vaind

.github/workflows/danger-workflow-tests.yml

@@ -8,8 +8,6 @@ on:
 jobs:
   danger:
     uses: ./.github/workflows/danger.yml
-    with:
-      _workflow_version: ${{ github.sha }}
 
   test-outputs:
     runs-on: ubuntu-latest

.github/workflows/danger.yml

@@ -1,12 +1,6 @@
 # Runs DangerJS with a pre-configured set of rules on a Pull Request.
 on:
   workflow_call:
-    inputs:
-      _workflow_version:
-        description: 'Internal: specify github-workflows (this repo) revision to use when checking out scripts.'
-        type: string
-        required: false
-        default: v2 # Note: update when publishing a new version
     outputs:
       outcome:
         description: Whether the Danger run finished successfully. Possible values are success, failure, cancelled, or skipped.
@@ -24,9 +18,10 @@ jobs:
 
       - name: Download dangerfile.js and utilities
         run: |
-          printenv
-          wget https://raw.githubusercontent.com/getsentry/github-workflows/${{ inputs._workflow_version }}/danger/dangerfile.js -P ${{ runner.temp }}
-          wget https://raw.githubusercontent.com/getsentry/github-workflows/${{ inputs._workflow_version }}/danger/dangerfile-utils.js -P ${{ runner.temp }}
+          # Extract the ref from GITHUB_WORKFLOW_REF (e.g., getsentry/github-workflows/.github/workflows/danger.yml@refs/pull/109/merge -> refs/pull/109/merge)
+          WORKFLOW_REF=$(echo "${{ github.workflow_ref }}" | sed 's/.*@//')
+          wget https://raw.githubusercontent.com/getsentry/github-workflows/${WORKFLOW_REF}/danger/dangerfile.js -P ${{ runner.temp }}
+          wget https://raw.githubusercontent.com/getsentry/github-workflows/${WORKFLOW_REF}/danger/dangerfile-utils.js -P ${{ runner.temp }}
 
       # Using a pre-built docker image in GitHub container registry instaed of NPM to reduce possible attack vectors.
       - name: Run DangerJS