Updated mediawiki/extensions
Project: mediawiki/extensions/CheckUser  cf1a80d73eb5e68c8238f1ba2a67bd6bb23f32e5

Add comment to updateCheckUserData indicating other extensions may call it

So people know to test integration with other extensions before
changing how the function works

Change-Id: I2ddaa3c98c5c6f3777288c844554b7d9c243d3ae