Change-prop: Rename backlinks module
Change-prop: Rename backlinks module

The backlinks-handling module has been renamed to dep_updates, so
reflect that in the config.

Change-Id: Ie637744d58ee3d2316295cdbd9943e9961331bb4

wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant