added AI tag in proper format

Author: asudbring

articles/virtual-network/tutorial-restrict-network-access-to-resources.md

@@ -6,7 +6,8 @@ ms.author: allensu
 ms.service: azure-virtual-network
 ms.topic: tutorial
 ms.date: 08/15/2024
-ms.custom: template-tutorial, devx-track-azurecli, devx-track-azurepowershell, ai-assisted
+ms.custom: template-tutorial, devx-track-azurecli, devx-track-azurepowershell
+ai-usage: ai-assisted
 
 # Customer intent: I want only resources in a virtual network subnet to access an Azure PaaS resource, such as an Azure Storage account.
 ---