chore: correct stale role_hierarchy comments

src/Controller/Admin/AccommodationBooking/IndexController.php

@@ -32,7 +32,8 @@ class IndexController extends AbstractController
     #[Route('/admin/accommodation-booking', name: 'app_admin_accommodationbooking')]
     public function index(Request $request): Response
     {
-        // ROLE_ADMIN inherits ROLE_GROUPS_ADMIN, so this single check covers both.
+        // ROLE_GROUPS_ADMIN is granted explicitly since 6c1073e4 removed it from ROLE_ADMIN's
+        // role_hierarchy — an administrator who needs this has to hold it in their own right.
         $seesAllBookings = $this->isGranted('ROLE_GROUPS_ADMIN');
         $user = $this->getUser();
         $user = $user instanceof User ? $user : null;