update with TP snippet

Author: jldohmann

modules/nw-autoscaling-ingress-controller.adoc

@@ -8,6 +8,9 @@
 
 Automatically scale an Ingress Controller to dynamically meet routing performance or availability requirements such as the requirement to increase throughput. The following procedure provides an example for scaling up the default `IngressController`.
 
+:FeatureName: The Custom Metrics Autoscaler
+include::snippets/technology-preview.adoc[leveloffset=+1]
+
 .Prerequisites
 . You have the OpenShift CLI (`oc`) installed.
 . You have access to an {product-title} cluster as a user with the `cluster-admin` role.