Build rate-limiter against gerrit stable-3.6

Bug: Issue 15831
Change-Id: I08369e3152ac10429e2d36aac5607771f2a57ea0
diff --git a/jenkins/gerrit-bazel-plugin-rate-limiter.yaml b/jenkins/gerrit-bazel-plugin-rate-limiter.yaml
index 4bc1751..ead5b61 100644
--- a/jenkins/gerrit-bazel-plugin-rate-limiter.yaml
+++ b/jenkins/gerrit-bazel-plugin-rate-limiter.yaml
@@ -6,6 +6,7 @@
             - master
           gerrit-branch:
             - master
+            - stable-3.6
             - stable-3.5
             - stable-3.4
             - stable-3.3