fix(helpdesk): inject appTitle/appUrl into HandoverNotificationService to avoid DB calls in tests

modules/helpdesk/tests/Module/Helpdesk/Service/HandoverNotificationServiceTest.php

@@ -11,7 +11,9 @@ class HandoverNotificationServiceTest extends TestCase
     private function createNotificationService(?MailService $mailService = null): HandoverNotificationService
     {
         return new HandoverNotificationService(
-            $mailService ?? $this->createMock(MailService::class)
+            $mailService ?? $this->createMock(MailService::class),
+            'TestApp',
+            'http://localhost',
         );
     }