Tweak read/write wording

Co-authored-by: Tim Bannister <[email protected]>

Author: mloskot

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, read or write, 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`