fix link to tor-bugs

tsa/howto/gitlab.mdwn

@@ -202,7 +202,7 @@ As of June 13th:
  2. Make sure the daily tools we use is ready such as IRC bots.
 
  3. Make sure TPO project issue change notifications are emailed to
-    the tor-bugs@lists.torproject.org mailing list.
+    the [tor-bugs](https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs) mailing list.
 
  4. Begin handing out some of the accounts to community members that
     we have created in their name(s).