Update location for "Related Commits" link in owners tool list

Summary:
D1631 updated the url for related commits, but missed the link here. This
rev updates the link in the owners tool list.

Task ID: #

Blame Rev:

Test Plan:
clicked the link, and it worked

Revert Plan:

Tags:

Reviewers: epriestley, jungejason

Reviewed By: jungejason

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D1691