Change AI usage from human-only to AI-assisted

Author: staleycyn

learn-pr/wwl-azure/design-network-solutions/index.yml

@@ -13,7 +13,7 @@ metadata:
   ms.custom:
   - N/A
   ms.service: azure
-  ai-usage: human-only
+  ai-usage: ai-assisted
 title: Design network solutions
 summary: Azure Architects need to design and recommend network solutions.
 abstract: |