Update zookeeper.md

Author: Rohan Kapse

content/en/docs/tutorials/stateful-application/zookeeper.md

@@ -26,7 +26,7 @@ Kubernetes concepts:
 - [Pods](/docs/concepts/workloads/pods/)
 - [Cluster DNS](/docs/concepts/services-networking/dns-pod-service/)
 - [Headless Services](/docs/concepts/services-networking/service/#headless-services)
-- [PersistentVolumes](/docs/concepts/storage/volumes/)
+- [PersistentVolumes](/docs/concepts/storage/persistent-volumes/) 
 - [PersistentVolume Provisioning](https://github.com/kubernetes/examples/tree/master/staging/persistent-volume-provisioning/)
 - [StatefulSets](/docs/concepts/workloads/controllers/statefulset/)
 - [PodDisruptionBudgets](/docs/concepts/workloads/pods/disruptions/#pod-disruption-budget)