Build reviewers-by-blame plugin on stable-3.3

Change-Id: Icfd1dc3a98c23ad929e1e2986049087502e7c60e
diff --git a/jenkins/gerrit-bazel-plugin-reviewers-by-blame.yaml b/jenkins/gerrit-bazel-plugin-reviewers-by-blame.yaml
index 82eecc4..7316e5b 100644
--- a/jenkins/gerrit-bazel-plugin-reviewers-by-blame.yaml
+++ b/jenkins/gerrit-bazel-plugin-reviewers-by-blame.yaml
@@ -10,5 +10,6 @@
             - master
           gerrit-branch:
             - master
+            - stable-3.3
             - stable-3.2
             - stable-3.1