Add view for Gerrit plugins on stable-3.13

Change-Id: I7efdfc552462af3a191b7af8352075be11de53d9
diff --git a/jenkins/gerrit-bazel-plugin-template.yaml b/jenkins/gerrit-bazel-plugin-template.yaml
index fe608fd..8f013bc 100644
--- a/jenkins/gerrit-bazel-plugin-template.yaml
+++ b/jenkins/gerrit-bazel-plugin-template.yaml
@@ -313,6 +313,7 @@
       - 'Plugins-{branch}'
     branch:
       - master
+      - stable-3.13
       - stable-3.12
       - stable-3.11
       - stable-3.10