Build owners plugin on its branch for stable-3.0

Change-Id: I6cb062cfe86fc849826e2d5f02499205ffa1a5b5
diff --git a/jenkins/gerrit-buck-bazel-plugin-owners.yaml b/jenkins/gerrit-buck-bazel-plugin-owners.yaml
index 0ed1097..d6a1c02 100644
--- a/jenkins/gerrit-buck-bazel-plugin-owners.yaml
+++ b/jenkins/gerrit-buck-bazel-plugin-owners.yaml
@@ -48,13 +48,8 @@
       - 'plugin-owners-bazel-{branch}':
           targets: 'plugins/owners plugins/owners-autoassign'
           branch:
+            - master
+            - stable-3.0
             - stable-2.16
             - stable-2.15
             - stable-2.14
-      - 'plugin-owners-bazel-{branch}-{gerrit-branch}':
-          targets: 'plugins/owners plugins/owners-autoassign'
-          branch:
-            - master
-          gerrit-branch:
-            - master
-            - stable-3.0