Update NotificationQueue.ts

The line `worker(counter++)` passed the previous state of the counter, I mean befor increment. So it is the same like `worker(0); couner = counter + 1`

apps/meteor/app/notification-queue/server/NotificationQueue.ts

@@ -102,7 +102,7 @@ class NotificationClass {
 			return true;
 		}
 
-		return this.worker(counter++);
+		return this.worker(++counter);
 	}
 
 	getNextNotification(): Promise<INotification | null> {