Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  d4817ad2c46f6a15d2527a92a3e0630465b22ca7

Move getEntityContent to ModifyClaim

- also fixed wrong documentation in ApiWikibase

Change-Id: Ibf6c30ee4e1205672718a36b49020d87f1f6e88c