Update GitHub Actions config

Author: emodric

.github/workflows/coding_standards.yml

@@ -13,7 +13,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6
+        with:
+          repository: netgen-layouts/layouts-coding-standard
+          path: vendor/netgen/layouts-coding-standard
       - uses: docker://oskarstark/php-cs-fixer-ga
         with:
           args: --diff --dry-run

.github/workflows/static_analysis.yml

@@ -18,7 +18,7 @@ jobs:
         script: ['phpstan', 'phpstan-tests']
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
       - uses: shivammathur/setup-php@v2
         with:
           php-version: '8.3'

.github/workflows/tests.yml

@@ -19,7 +19,7 @@ jobs:
         phpunit: ['phpunit.xml', 'phpunit-integration-legacy.xml']
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
       - uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}