[Cogsvcs] Personalizer - fix SDK ref doc for .Net

Author: diberry

articles/cognitive-services/personalizer/toc.yml

@@ -80,8 +80,8 @@
     items:
     - name: .NET
       items: 
-      - name: .NET SDK Reference 
-        href: https://go.microsoft.com/fwlink/?linkid=2092353
+      - name: Reference 
+        href: https://docs.microsoft.com/dotnet/api/overview/azure/cognitiveservices/client/personalizer?view=azure-dotnet
       - name: NuGet package
         href: https://go.microsoft.com/fwlink/?linkid=2092272
     - name: Go