Update module date and AI usage, remove B2C topic

Updated the module date and AI usage settings. Removed Azure Active Directory B2C from the design topics.

Author: staleycyn

learn-pr/wwl-azure/design-authentication-authorization-solutions/index.yml

@@ -3,15 +3,15 @@ uid: learn.wwl.design-authentication-authorization-solutions
 metadata:
   title: Design Authentication and Authorization Solutions
   description: "Azure Architects design and recommend authentication and authorization solutions."
-  ms.date: 01/18/2026
+  ms.date: 03/23/2026
   author: wwlpublish
   ms.author: cynthist
   ms.topic: module
   ms.collection: N/A
   ms.custom:
   - N/A
   ms.service: azure
-  ai-usage: human-only
+  ai-usage: ai-assisted
 title: Design authentication and authorization solutions
 summary: Azure Architects design and recommend authentication and authorization solutions.
 abstract: |
@@ -23,8 +23,6 @@ abstract: |
 
   -   Design for Microsoft Entra business-to-business (B2B).
 
-  -   Design for Azure Active Directory B2C (business-to-customer).
-
   -   Design for conditional access.
 
   -   Design for identity protection.