Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  cf70eb16c0f754ad6772246cded1c08ca98790a4

Consistency tweak: article -> page

Per Siebrand:
https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Wikibase-unconnectedpages-page/en

Change-Id: Ibf09aa1d75cba219c5baa4fe22b4a9ffe0bb0de6