Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  0709f641481cc0874c35dfdd5076ed04ac1923f7

Fix LangLinkHandlerTest to use spaces, not underscores

- follow up to change 9a21a0625

Change-Id: Iadaf13e7fe9309f77f9d1c91f03976e6b1b9b403