Merge pull request #53970 from ahardin-rh/ovn-vs-sdn

OSDOCS-4694: OVN updates for 4.12

Author: ahardin-rh

networking/ovn_kubernetes_network_provider/about-ovn-kubernetes.adoc

@@ -12,10 +12,7 @@ OVN-Kubernetes is based on Open Virtual Network (OVN) and provides an overlay-ba
 A cluster that uses the OVN-Kubernetes network provider also runs Open vSwitch (OVS) on each node.
 OVN configures OVS on each node to implement the declared network configuration.
 
-[NOTE]
-====
-OVN-Kubernetes is the default networking solution for {sno} deployments.
-====
+OVN-Kubernetes is the default networking plug-in in Red Hat OpenShift Networking. For all prior versions of {product-title}, OpenShift SDN was the default networking plug-in.
 
 include::modules/nw-ovn-kubernetes-features.adoc[leveloffset=+1]