chore: added PHP 8.4 to PHPUnit workflow

Author: ddevsr

.github/workflows/phpunit.yml

@@ -38,7 +38,7 @@ jobs:
     if: "!contains(github.event.head_commit.message, '[ci skip]')"
     strategy:
       matrix:
-        php-versions: ['8.1', '8.2', '8.3']
+        php-versions: ['8.1', '8.2', '8.3', '8.4']
         db-platforms: ['MySQLi', 'SQLite3']
         include:
           # Postgre