Updated mediawiki/extensions
Project: mediawiki/extensions/NavigationTiming  58deafa71ef17ee971d1922268ef89ef4bb4b8aa

Bump schema revision to 7494934

Schema 7494934 drops the 'userAgent' field. It is now redundant, since
'userAgent' is logged in the EventCapsule wrapper.

Change-Id: I6a8e02bb5180e981d4360c94a6c3a7cc76f4d6fd