Build find-owners plugin against its own 3.2 branch

Change-Id: I452aec8bea5530b310ad7252459a81bf773681e8
diff --git a/jenkins/gerrit-bazel-plugin-find-owners.yaml b/jenkins/gerrit-bazel-plugin-find-owners.yaml
index e5505f1..cf281ac 100644
--- a/jenkins/gerrit-bazel-plugin-find-owners.yaml
+++ b/jenkins/gerrit-bazel-plugin-find-owners.yaml
@@ -6,9 +6,9 @@
             - master
           gerrit-branch:
             - stable-3.3
-            - stable-3.2
       - 'plugin-{name}-bazel-{branch}':
           branch:
             - master
+            - stable-3.2
             - stable-3.1
             - stable-2.16