Update phpunit to use phpunit.xml

Author: mintopia

.github/workflows/code-quality.yml

@@ -66,7 +66,7 @@ jobs:
         run: phpcs
 
       - name: Run tests and collect coverage
-        run: vendor/bin/phpunit --coverage-clover coverage.xml .
+        run: vendor/bin/phpunit --coverage-clover coverage.xml
 
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v5