Updated list of repositories that ping #wikimedia-qa

qa/browsertests was the only repository in qa, and it is no longer used.

mediawiki/ruby/api is the only repository in mediawiki/ruby at the
moment, but there might be more in the future.

Change-Id: Ie6587a2a5262e38e1fcc4f40e9dc7d13f8e5c7ef