Replace department logo
Summary: Replace old mbi logo for the new watermark MITK|dkfz
Test Plan: Manual Testing
Reviewers: goch, O1 MITK Core
Reviewed By: goch, O1 MITK Core
Subscribers: metzger, kirchnth
Maniphest Tasks: T23330
Differential Revision: https://phabricator.mitk.org/D67