git-repo-metrics: Add change verification

Change-Id: I2017cd91e71fed2ca7b413e4f7be17575884c67e
diff --git a/jenkins/gerrit-bazel-plugin-git-repo-metrics.yaml b/jenkins/gerrit-bazel-plugin-git-repo-metrics.yaml
index dd00b82..87d278b 100644
--- a/jenkins/gerrit-bazel-plugin-git-repo-metrics.yaml
+++ b/jenkins/gerrit-bazel-plugin-git-repo-metrics.yaml
@@ -8,3 +8,4 @@
             - stable-3.7
             - stable-3.6
             - stable-3.5
+      - 'plugin-{name}-verifier'