Update PersistentStorage README

The updates serve to clarify that both static and dynamic provisioning
are supported, but that users should read the official documentation in
order to find out how to set them up.

examples/persisted/README.md

@@ -3,13 +3,20 @@
 Habitat objects are translated by the operator into `StatefulSet` objects, which
 provide optional support for persistent storage.
 
-In order to enable persistent storage for your Habitat object, you need to:
+In order to enable persistent storage for your Habitat object, you need to
+configure [persistent
+storage](https://kubernetes.io/docs/concepts/storage/persistent-volumes/) on
+your cluster. Detailed instructions on how to do that are beyond the scope of
+this README, but what you should end up with is:
 
-* create a
-[`StorageClass`](https://kubernetes.io/docs/concepts/storage/storage-classes/) object in your cluster
-* add the `spec.persistence` key to the Habitat object's manifest
-* specify the `name` of the aforementioned `StorageClass` object under
-`spec.persistence.storageClassName` in the Habitat object's manifest
+* a cluster configured for either static or dynamic provisioning,
+* a `StorageClass` object,
+
+Once you've done that, you can proceed to creating the `Habitat` object:
+
+* populate the `spec.persistentStorage` struct in the `Habitat`'s manifest
+* specify the `name` of the previously created `StorageClass` under
+`spec.persistence.storageClassName` in the `Habitat`'s manifest
 
 ## Workflow