Update bypass-review.yaml

.github/workflows/bypass-review.yaml

@@ -16,6 +16,11 @@ jobs:
       - name: Fetch main branch
         run: git fetch origin main:main
 
+      - name: Fetch PR branch
+        run: |
+          git fetch origin $GITHUB_HEAD_REF:$GITHUB_HEAD_REF
+          git checkout $GITHUB_HEAD_REF
+
       - name: Set up GitHub CLI Authentication
         env:
           GH_TOKEN: ${{ secrets.ADMIN_PAT }}
@@ -29,7 +34,7 @@ jobs:
 
       - name: Check for specific files and approve if conditions are met
         run: |
-          FILES=$(git diff --name-only main ${{ github.head_ref }} || git diff --name-only main $GITHUB_REF_NAME)
+          FILES=$(git diff --name-only main $GITHUB_HEAD_REF)
           if echo "$FILES" | grep -qvE '(\.css$|^hushline/version.py$)'; then
             echo "PR contains files other than .css or hushline/version.py. Exiting without approval."
             exit 0