Add PHP 8.3 and 8.4 to GitHub Actions workflow

Extend the PHP version matrix in the CI workflow to include PHP 8.3 and 8.4. This ensures compatibility testing with newer PHP versions and improves future-proofing of the project.

.github/workflows/php.yml

@@ -6,7 +6,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2']
+                php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
         name: PHP ${{ matrix.php }}
         steps:
             - uses: actions/checkout@v1