Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  981bf35bc0593a94f074b30e2f6d2551fd16e011

Get rid of 3rd argument in calls to Templating::renderPost()

3rd parameter is $return, not some instance of PostRevision; root post being
tossed in is incorrect

Change-Id: I4f48cf1b198e687d56d844206b95ef6b1b5b3c9e