Apply only fixes compatible with PHP 7.2

Author: mpdude

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

@@ -21,7 +21,7 @@ jobs:
                     ref: ${{ github.head_ref }}
 
             -   name: Run PHP-CS-Fixer
-                uses: docker://ghcr.io/webfactory/php-cs-fixer:3.62.0
+                uses: docker://ghcr.io/php-cs-fixer/php-cs-fixer:3.62.0-php7.2
 
             -   name: Commit and push back changes
                 uses: stefanzweifel/git-auto-commit-action@v4