Change AI usage from human-only to ai-assisted

Author: staleycyn

learn-pr/wwl-azure/design-governance/index.yml

@@ -11,7 +11,7 @@ metadata:
   ms.custom:
   - N/A
   ms.service: azure
-  ai-usage: human-only
+  ai-usage: ai-assisted
 title: Design governance
 summary: Azure Architects design and recommend governance solutions.
 abstract: |