Build high-availability on stable-3.{5,6} branches

Change-Id: Ic149ae121ebccf8b52a7e1cf9f111d99fb98e377
diff --git a/jenkins/gerrit-bazel-plugin-high-availability.yaml b/jenkins/gerrit-bazel-plugin-high-availability.yaml
index ab35205..3d9c6e5 100644
--- a/jenkins/gerrit-bazel-plugin-high-availability.yaml
+++ b/jenkins/gerrit-bazel-plugin-high-availability.yaml
@@ -4,11 +4,11 @@
       - 'plugin-{name}-bazel-{branch}':
           branch:
             - master
+            - stable-3.6
+            - stable-3.5
       - 'plugin-{name}-bazel-{branch}-{gerrit-branch}':
           branch:
             - master
           gerrit-branch:
             - stable-3.7
-            - stable-3.6
-            - stable-3.5
       - plugin-{name}-verifier