Updated mediawiki/extensions
Project: mediawiki/extensions/TwnMainPage  ca1eb140cac1f065bf6695f5fae0be6070a49f33

Add FirstSteps alias to MainPage

FirstSteps will be removed from Translate, and this ensures that people
clicking links with the old reference will not run into a 404.

Change-Id: I365c76daac9a9b4c8dd73b4c6e8df30812e4fb42