Link to PVC API reference from "Persistent Volumes" concept page (#48391)

* Update persistent-volumes.md

* Update persistent-volumes.md

Co-authored-by: Dipesh Rawat <[email protected]>

---------

Co-authored-by: Dipesh Rawat <[email protected]>

Author: dev-johnn

content/en/docs/concepts/storage/persistent-volumes.md

@@ -9,6 +9,8 @@ title: Persistent Volumes
 api_metadata:
 - apiVersion: "v1"
   kind: "PersistentVolume"
+- apiVersion: "v1"
+  kind: "PersistentVolumeClaim"
 feature:
   title: Storage orchestration
   description: >