Build rate-limiter plugin on its own stable-3.2 branch

Change-Id: I4e543d0ef770f1da0115e6204d0ec2387b1a26f4
diff --git a/jenkins/gerrit-bazel-plugin-rate-limiter.yaml b/jenkins/gerrit-bazel-plugin-rate-limiter.yaml
index 86fefad..d50f717 100644
--- a/jenkins/gerrit-bazel-plugin-rate-limiter.yaml
+++ b/jenkins/gerrit-bazel-plugin-rate-limiter.yaml
@@ -6,9 +6,9 @@
             - master
           gerrit-branch:
             - master
-            - stable-3.2
       - 'plugin-{name}-bazel-{branch}':
           branch:
+            - stable-3.2
             - stable-3.1
             - stable-3.0
             - stable-2.16