Build github plugin master against stable-3.14

Change-Id: I41840d2729378ec110d5ea9b855b7e0c71d25edf

jenkins/gerrit-bazel-plugin-github.yaml

diff --git a/jenkins/gerrit-bazel-plugin-github.yaml b/jenkins/gerrit-bazel-plugin-github.yaml
index 73e5926..cd434ff 100644
--- a/jenkins/gerrit-bazel-plugin-github.yaml
+++ b/jenkins/gerrit-bazel-plugin-github.yaml
@@ -6,6 +6,7 @@
       - 'plugin-{name}-gh-bazel-{branch}':
           branch:
             - master
+            - stable-3.14
             - stable-3.13
           extra-artifacts: >
             bazel-bin/plugins/github/github-*.jar,