Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  a860acef9c68dcf52fa72d54d98358da9872b929

Add missing doc stars

I guess one star is for disabled code and two are for documentation.
This actually makes a difference in PHPStorm. The weblink becomes
clickable with two stars.

This is a direct follow-up to
I3eeb704dd8ab923fed7a17280ad4fceaab9b2e0c.

Change-Id: I388af7704e11f2d5042d4642d7a557f62f003b01