Build kafka-events with Gerrit 2.14

Change-Id: I5bfcf17f915631edfb590595d81207090ccc33c3
diff --git a/jenkins/gerrit-buck-bazel-plugin-kafka-events.yaml b/jenkins/gerrit-buck-bazel-plugin-kafka-events.yaml
index a73c7f6..0e2b3e0 100644
--- a/jenkins/gerrit-buck-bazel-plugin-kafka-events.yaml
+++ b/jenkins/gerrit-buck-bazel-plugin-kafka-events.yaml
@@ -6,4 +6,5 @@
             - stable-2.13
       - 'plugin-{name}-bazel-{branch}':
           branch:
+            - stable-2.14
             - master