Updated mediawiki/extensions
Project: mediawiki/extensions/Campaigns  52d0884bbff7f2d2f24bcdf0c335ab57f6e96c23

Remove period from campaigns-desc for consistency

<https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Campaigns-desc/en>

Change-Id: I6eecd643018f8e1903fd11a603c9025ef438d220