Update PHP version to 'latest' in code-quality workflow

Switched from PHP 7.4 to 'latest' in the code-quality GitHub Actions workflow to ensure compatibility with the most up-to-date PHP version. This change improves maintainability and aligns the build process with modern PHP standards.

.github/workflows/code-quality.yml

@@ -11,7 +11,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 'latest'
 
       - name: Install dependencies
         run: composer install --prefer-dist --no-progress --no-suggest