Updated mediawiki/extensions
Project: mediawiki/extensions/Translate  fb28bd0257880c345532f40e940e8cc1619550d7

Replace $wgSpecialPageGroups with SpecialPage::getGroupName()

The global was deprecated in 1.21 and kept for BC.
Translate is currently compatible with 1.22 and later.

Change-Id: I306e41c1a9e26dffdf1bcdb89ecbd036daf53ac9