Updates k8s nmstate xref

Author: Steven Smith

networking/k8s_nmstate/k8s-nmstate-updating-node-network-config.adoc

@@ -9,7 +9,7 @@ toc::[]
 
 After you install the Kubernetes NMState Operator, you can use the Operator to observe and update your cluster's node network state and network configuration.
 
-For more information about how to install the NMState Operator, see xref:../../networking/networking_operators/k8s-nmstate-about-the-k8s-nmstate-operator#k8s-nmstate-about-the-k8s-nmstate-operator[Kubernetes NMState Operator].
+For more information about how to install the NMState Operator, see xref:../../networking/networking_operators/k8s-nmstate-about-the-k8s-nmstate-operator.adoc#k8s-nmstate-about-the-k8s-nmstate-operator[Kubernetes NMState Operator].
 
 [IMPORTANT]
 ====