Updated mediawiki/extensions
Project: mediawiki/extensions/GettingStarted  7dbb31a3e8c76cf4333bedc586fc018d698b3879

Update copy

Import the English strings from
https://trello.com/c/huG9wdua/365-update-gettingstarted-with-new-cta-and-tour-copy.

Change-Id: If915cb1b25be00b3a6526fac9c3e03ab629f93f5