Update toc.yml (#35645)

Author: tdykstra

aspnetcore/toc.yml

@@ -1139,9 +1139,6 @@ items:
         href: https://github.com/grpc/grpc-dotnet/tree/master/examples
       - name: Troubleshoot
         uid: grpc/troubleshoot
-  - name: Best practices
-    displayName: performance
-    uid: fundamentals/best-practices
   - name: Servers
     items:
       - name: Overview
@@ -1932,6 +1929,9 @@ items:
     items:
       - name: Overview
         uid: performance/overview
+      - name: Best practices
+        displayName: performance
+        uid: fundamentals/best-practices
       - name: Caching
         items:
           - name: Overview