OSDOCS-4148-About adds vSphere to supported k8s-nmstate platforms list

Author: ShaunaDiaz

networking/k8s_nmstate/k8s-nmstate-about-the-k8s-nmstate-operator.adoc

@@ -11,7 +11,7 @@ The Kubernetes NMState Operator provides a Kubernetes API for performing state-d
 
 [IMPORTANT]
 ====
-Red Hat supports the Kubernetes NMState Operator in production environments on bare-metal, IBM Power, IBM Z, and LinuxONE installations.
+Red Hat supports the Kubernetes NMState Operator in production environments on bare-metal, IBM Power, IBM Z, LinuxONE, and VMWare vSphere installations.
 ====
 
 Before you can use NMState with {product-title}, you must install the Kubernetes NMState Operator.