Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  273e1d97f69574805a37b808da7a74489b877f2e

Fix typo.

Spotted by Jean-Fred and reported at https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Mobile-frontend-profile-user-desc-3

Change-Id: I5b159994bda221dc932a70b0354c669aa15aaa6e