Adds a new stable-14 branch

Change-Id: If78bc9b252df178af84a059c6eb57d4066ad079b
diff --git a/jenkins/gerrit-mvn-plugin-slack-integration.yaml b/jenkins/gerrit-mvn-plugin-slack-integration.yaml
index 2c540be..b8333d9 100644
--- a/jenkins/gerrit-mvn-plugin-slack-integration.yaml
+++ b/jenkins/gerrit-mvn-plugin-slack-integration.yaml
@@ -3,6 +3,7 @@
     repo: slack-integration
     branch:
       - master
+      - stable-2.14
       - stable-2.13
       - stable-2.12
       - stable-2.11