Update tests/app/notify_client/test_service_api_client.py
Update tests/app/notify_client/test_service_api_client.py

Co-authored-by: Chris Hill-Scott <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@quis.cc>
alphagov/notifications-admin,alphagov/notifications-admin,alphagov/notifications-admin,alphagov/notifications-admin