Update poddisruptionbudget api

This is the current API spec.

Change-Id: I808c19ddad09bd81a35d7fc73a266412c8b86445

k8s/zookeeper/zookeeper.yaml

diff --git a/k8s/zookeeper/zookeeper.yaml b/k8s/zookeeper/zookeeper.yaml
index 8f39052..91e42a5 100644
--- a/k8s/zookeeper/zookeeper.yaml
+++ b/k8s/zookeeper/zookeeper.yaml
@@ -1,6 +1,6 @@
 ---
 # Source: zookeeper/templates/poddisruptionbudget.yaml
-apiVersion: policy/v1beta1
+apiVersion: policy/v1
 kind: PodDisruptionBudget
 metadata:
   name: zookeeper