fix wrong namespace use

apps/backend/app/Notifications/TaskDeleted.php

@@ -2,8 +2,8 @@
 
 namespace app\Notifications;
 
-use apps\backend\app\Models\Event;
-use apps\backend\app\Models\Task;
+use app\Models\Event;
+use app\Models\Task;
 use Illuminate\Bus\Queueable;
 use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
 use Illuminate\Notifications\Messages\BroadcastMessage;