fix links

Author: alexwolfmsft

docs/azure/toc.yml

@@ -27,9 +27,9 @@ items:
     - name: GitHub Copilot app modernization for .NET
       items:
         - name: Overview
-          href: ./migration/appmod/overview.md
+          href: ../core/porting/github-copilot-app-modernization-overview.md
         - name: FAQ
-          href: ./migration/appmod/faq.md
+          href: ../core/porting/github-copilot-app-modernization-faq.md
         - name: Predefined Tasks
           href: ./migration/appmod/predefined-tasks.md
         - name: Quickstart - Assess and migrate a .NET project