gh: fix php-actions/phpunit by setting 'correct' test_suffix over 'incorrect' default variable

Author: Bl00D4NGEL

.github/workflows/test.yml

@@ -23,8 +23,9 @@ jobs:
               with:
                   version: 11.5
                   php_version: 8.3
+                  test_suffix: Test.php
                   configuration: phpunit.xml
-                  php_extensions: "xdebug"
+                  php_extensions: xdebug
                   coverage_text: true
                   coverage_clover: reports/coverage.xml