fix stefanzweifel/git-auto-commit-action warning

Author: fadrian06

.github/workflows/lint.yml

@@ -11,6 +11,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v6
+        with:
+          ref: ${{ github.event.pull_request.head.ref || github.ref }}
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2