Updated mediawiki/extensions
Project: mediawiki/extensions/MediaWikiChat  c3b113d489f622a0f3d16e045dda08a092bb5d26

i18n: fix typo "receiving"

Spotted by Jagwar
https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Tog-chat-ping-mention/en

Change-Id: I3c5f056c2cc5ad291aa2acc417a93c9eefd9ab02