Always show repository in Differential emails.
Summary: Ref T5137. A slight modification to D9609, such that the repository is always included in Differential emails. Otherwise "Accepted", "Closed" and "Requested Changes To" emails don't include the repository.
Test Plan: Not tested.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: epriestley, Korvin
Maniphest Tasks: T5137
Differential Revision: https://secure.phabricator.com/D9728