Fix: Correct typo in template render argument in RootController

src/Controller/RootController.php

@@ -11,7 +11,7 @@ final class RootController extends AbstractController
     #[Route('/', name: 'app_root')]
     public function index(): Response
     {
-        return $this->render('root/root.html.twig, [
+        return $this->render('root/root.html.twig', [
             'controller_name' => 'RootController',
         ]);
     }