Merge pull request #49447 from mloskot/ml/clarify-access-mode-vs-multiple-pods

Clarify ReadWriteOnce allows multiple pods to read and write

Author: k8s-ci-robot

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

@@ -632,7 +632,7 @@ The access modes are:
 
 `ReadWriteOnce`
 : the volume can be mounted as read-write by a single node. ReadWriteOnce access
-  mode still can allow multiple pods to access the volume when the pods are
+  mode still can allow multiple pods to access (read from or write to) that volume when the pods are
   running on the same node. For single pod access, please see ReadWriteOncePod.
 
 `ReadOnlyMany`