fix: use correct request type for travel documents

src/Controller/Booking/DownloadController.php

@@ -44,7 +44,7 @@ class DownloadController extends AbstractController
         }
 
         $type = match ($fileType) {
-            'documents' => 'Dokumentendruck',
+            'documents' => 'Dokumentdruck',
             'confirmation' => 'Vorgangdruck',
         };