Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  891d447461e26e6adf09fe51de8adf5411bfcc1a

Workflow no longer stores any user information

We stripped the user information out of Workflow, but forgot
to remove it from the UserMerger which was being written at
the same time.  Remove lingering references to workflow_user_id
and friends.

Bug: T78422
Change-Id: I1c2039be3c92d089a68acfdab4d459841879d7db