Fix: Remove invalid ref for push events

Author: İbrahim Halil Oğlakcı

.github/workflows/fix-php-code-style-issues.yml

@@ -15,8 +15,7 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
-        with:
-          ref: ${{ github.head_ref }}
+        # ref satırını sildik, artık otomatik algılayacak
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2