Updated mediawiki/extensions
Project: mediawiki/extensions/WikimediaMessages  6c60d2c6093fd8729e272cdfc4f675c3087deae5

Rephrase wikimedia-sulrenamewarning-usenew

It mixed "future" and "now", and now it's more consistent.
I also fixed wording a bit in other passages.

Change-Id: I63f7192953fd90dbc9e6c72833b990fab98e200a