OCPBUGS-14908: Include ARO in migration note

- https://issues.redhat.com/browse/OCPBUGS-14908

Author: jab-rh

modules/nw-ovn-kubernetes-migration-about.adoc

@@ -20,7 +20,7 @@ A migration to the OVN-Kubernetes network plugin is supported on the following p
 
 [IMPORTANT]
 ====
-Migrating to or from the OVN-Kubernetes network plugin is not supported for managed OpenShift cloud services such as OpenShift Dedicated and Red Hat OpenShift Service on AWS (ROSA).
+Migrating to or from the OVN-Kubernetes network plugin is not supported for managed OpenShift cloud services such as {product-dedicated}, Azure Red Hat OpenShift(ARO), and Red Hat OpenShift Service on AWS (ROSA).
 ====
 
 [id="considerations-migrating-ovn-kubernetes-network-provider_{context}"]