fixed link

Author: Nickomang

articles/aks/http-proxy.md

@@ -16,7 +16,7 @@ This feature adds HTTP proxy support to AKS clusters, exposing a straightforward
 
 Some more complex solutions may require creating a chain of trust to establish secure communications across the network. The feature also enables installation of a trusted certificate authority onto the nodes as part of bootstrapping a cluster.
 
-https://docs.microsoft.com/en-us/azure/virtual-machines/states-billing
+[!INCLUDE [preview features callout](./includes/preview/preview-callout.md)]
 
 ## Limitations and other details