fix toc

Author: alexwolfmsft

docs/azure/TOC.yml

@@ -71,6 +71,8 @@
         href: ./sdk/authentication/additional-methods.md
       - name: Credential chains
         href: ./sdk/authentication/credential-chains.md
+    - name: ASP.NET Core guidance
+      href: ./sdk/aspnetcore-guidance.md
     - name: Resource management
       href: ./sdk/resource-management.md
     - name: Dependency injection