Build uploadvalidator  master with Gerrit stable-3.11

Change-Id: Ia581158f321058879a0358106fb88f212fe3d765
diff --git a/jenkins/gerrit-bazel-plugin-uploadvalidator.yaml b/jenkins/gerrit-bazel-plugin-uploadvalidator.yaml
index c2cedbf..fa27b00 100644
--- a/jenkins/gerrit-bazel-plugin-uploadvalidator.yaml
+++ b/jenkins/gerrit-bazel-plugin-uploadvalidator.yaml
@@ -9,5 +9,6 @@
           branch:
             - master
           gerrit-branch:
+            - stable-3.11
             - stable-3.10
             - stable-3.9