Added PHP versions to the pr-validation.yml

Author: hubipe

.github/workflows/pr-validation.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-versions: ['7.4', '8.0', '8.1', '8.2']
+        php-versions: ['7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
     steps:
     - name: Setup PHP
       uses: shivammathur/setup-php@v2