update VPC peer warning

Author: mletalie

modules/aws-vpc.adoc

@@ -11,7 +11,7 @@ A Virtual Private Cloud (VPC) peering connection is a networking connection betw
 
 [WARNING]
 ====
-Private clusters cannot be fully deleted by {cluster-manager-first} if the VPC the cluster is installed in is peered.
+Before you attempt to uninstall a cluster, you must remove any VPC peering connections from the cluster's VPC. Failure to do so might result in a cluster not completing the uninstall process.
 
 AWS supports inter-region VPC peering between all commercial regions link:https://aws.amazon.com/vpc/faqs/#Peering_Connections[excluding China].
 ====