Use actions/checkout@v3

Author: Sammyjo20

.github/workflows/php-cs-fixer.yml

@@ -20,10 +20,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
-        with:
-          ref: ${{ github.head_ref }}
-          token: ${{ secrets.PHP_CS_FIXER }}
+        uses: actions/checkout@v3
       - name: Run PHP CS Fixer
         uses: docker://oskarstark/php-cs-fixer-ga
         with: