Updated mediawiki/extensions
Project: mediawiki/extensions/CheckUser  e318a95a312ad9694a9270ea9f881f0a88328387

Bump version to 2.4

The version was never bumped when the i18n messages were
converted to the JSON format.

Change-Id: Ib7a53e52bb9f1eb5798e770afa862ad5386a3cd1