Add note about common PVC deletion

Signed-off-by: David Kwon <dakwon@redhat.com>

modules/installation-guide/partials/con_persistent-volume-configuration.adoc

@@ -30,6 +30,8 @@ PVC has, they will use the same shared folder in the common PVC.
 
 When a workspace is deleted, a corresponding subdirectory (`$\{ws-id}`) is deleted in the PV directory.
 
+NOTE: The common PVC will be removed once all of the user's workspaces are deleted. The PVC will be re-created once a new non-ephemeral workspace is started.
+
 .Restrictions on using the `common` PVC strategy
 
 When the `common` strategy is used and a workspace PVC access mode is ReadWriteOnce (RWO), only one node can simultaneously use the PVC.