Fix IC 148 departure time, changed by 3 minutes since 10 years ago

This makes realtime departure information and vehicle layouts work as well.

tests/osnabrueck2021.json

@@ -29,7 +29,7 @@
                 "identifier": "ibnr:8011160",
                 "name": "Berlin Hbf"
             },
-            "departureTime": "2021-01-09T08:37:00",
+            "departureTime": "2021-01-09T08:34:00",
             "trainNumber": "IC 148"
         },
         "reservationNumber": "OSNA21",