Add stable-2.13 branch to quota plugin

Change-Id: Ic476dad2c94f66993ce199d5d247cea84541b61c
diff --git a/jenkins/gerrit-buck-plugin-quota.yaml b/jenkins/gerrit-buck-plugin-quota.yaml
index eeb15b1..c76fb41 100644
--- a/jenkins/gerrit-buck-plugin-quota.yaml
+++ b/jenkins/gerrit-buck-plugin-quota.yaml
@@ -2,6 +2,7 @@
     name: quota
     branch:
       - master
+      - stable-2.13
       - stable-2.12
       - stable-2.11
     jobs: