Ctrl + F on http://bots.wmflabs.org/~wm-bot/db/%23mediawiki.htm gives 27 usages
Some are probably ok (aliases and such), but some plainly need updating
[22:10:20] <Reedy> !bug
[22:10:20] <wm-bot> https://bugzilla.wikimedia.org/
Another being vebug giving "Submit a new ticket on Bugzilla for the VisualEditor: https://bugzilla.wikimedia.org/enter_bug.cgi?product=VisualEditor"