Updated mediawiki/extensions
Project: mediawiki/extensions/WikimediaMessages  d373fd87b17bfb67f6616011ec1faa2531e58878

Update for release of MW 1.23

This is relevant for non-English users of mediawiki.org. Also some typo
fixes in qqq

Change-Id: I4ea87b710d7a3e30a938817179483248db316a22