Bug 1872799 - [tb-monthly] Update Balrog rule ID's for staging releases. r=dandarnell

Differential Revision: https://phabricator.services.mozilla.com/D201843

--HG--
extra : amend_source : cc33e81bbe2219c2cfc48ea451df4c72c44e340f

taskcluster/ci/release-balrog-scheduling/kind.yml

@@ -38,7 +38,8 @@ jobs:
                     staging:
                         by-release-type:
                             beta: [43]
-                            release: [903]
+                            release: [912]
+                            esr115: [916]
                             default: []
             background-rate:
                 by-release-type: