PhpCsFixer: Execute on pull requests

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

@@ -1,11 +1,17 @@
 name: "PHP-CS-Fixer"
 
 on:
+    pull_request_target:
+        branches:
+            - "[0-9]+.[0-9]+"
+            - "[0-9]+.x"
+            - "feature-*"
     push:
         branches:
             - "[0-9]+.[0-9]+"
             - "[0-9]+.x"
             - "*_actions"
+            - "feature-*"
 
 permissions:
     contents: read
@@ -16,13 +22,14 @@ jobs:
             contents: write  # for stefanzweifel/git-auto-commit-action to push code in repo
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v2
+            - uses: actions/checkout@v4
               with:
-                  ref: ${{ github.head_ref }}
+                  ref: ${{ github.event.pull_request.head.ref }}
+                  repository: ${{ github.event.pull_request.head.repo.full_name }}
 
             - name: PHP-CS-Fixer
               uses: docker://oskarstark/php-cs-fixer-ga:latest
 
-            - uses: stefanzweifel/git-auto-commit-action@v4
+            - uses: stefanzweifel/git-auto-commit-action@v5
               with:
                   commit_message: Apply php-cs-fixer changes