OADP-1068: Missing CSI snapshot API details

Signed-off-by: Andy Arnold <[email protected]>

Author: anarnold97

modules/oadp-plugins.adoc

@@ -36,6 +36,8 @@ OADP also provides plugins for {product-title} resource backups, OpenShift Virtu
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 1. Mandatory.
 2. Virtual machine disks are backed up with CSI snapshots or Restic.
-3. The `csi` plugin uses the link:https://velero.io/docs/main/csi/[Velero CSI beta snapshot API].
+3. The `csi` plugin uses the Kubernetes CSI snapshot API.
+* OADP 1.1 or later uses `snapshot.storage.k8s.io/v1`
+* OADP 1.0 uses `snapshot.storage.k8s.io/v1beta1`
 4. OADP 1.2 only.
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