[5.3] Github Actions: Automatic codestyle fixes for PRs

.github/workflows/ci.yml

@@ -70,7 +70,12 @@ jobs:
       - name: Check PHP code style
         env:
           PHP_CS_FIXER_IGNORE_ENV: true
-        run: ./libraries/vendor/bin/${{ matrix.command }}
+        run: |
+          git config --global --add safe.directory $GITHUB_WORKSPACE
+          ./libraries/vendor/bin/${{ matrix.command }}
+      - uses: parkerbxyz/suggest-changes@v2
+        with:
+          comment: 'Your code does not comply with our codestyle. Please commit the suggested changes.'
 
   code-style-js-css:
     name: Check Javascript & CSS code style