Rector changes and immplementations of required methods

src/Bundle/ChillMainBundle/Controller/UIController.php

@@ -21,7 +21,7 @@ class UIController extends AbstractController
 {
     public function showNotificationUserCounterAction(
         CountNotificationUser $counter,
-    ) {
+    ): \Symfony\Component\HttpFoundation\Response {
         $nb = $counter->getSumNotification($this->getUser());
 
         return $this->render('@ChillMain/UI/notification_user_counter.html.twig', [