Update actions/checkout action to v7

Author: renovate[bot]

.github/workflows/quality-assurance.yml

@@ -17,7 +17,7 @@ jobs:
       matrix:
         php-version: [8.2, 8.3]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php-version }}
@@ -27,7 +27,7 @@ jobs:
   php-cs-fixer:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: shivammathur/setup-php@v2
         with:
           php-version: 8.2