Bug 1572316 - Follow-up: Fix paths to check for changes in l10n-bump-beta task. r=darktrojan

l10n-bump-beta did not trigger as expected on comm-beta. skip-unless-changed paths
are relative to GECKO.

--HG--
extra : rebase_source : 9fb82b9854e012f929ab888380bb7bccc571f2e8
extra : amend_source : 5e46009f11b3af42d7d5238c2d6c675a5323bb43

taskcluster/ci/l10n-bump/kind.yml

@@ -99,5 +99,5 @@ jobs:
             tier: 1
         optimization:
             skip-unless-changed:
-                - mail/config/version.txt
-                - .gecko_rev.yml
+                - comm/mail/config/version.txt
+                - comm/.gecko_rev.yml