adding zone pivot

Author: aahill

zone-pivots/zone-pivot-groups.yml

@@ -1106,8 +1106,10 @@ groups:
   title: Selections
   prompt: What would you like to see?
   pivots:
-  - id: portal
+  - id: Azure AI Foundry
     title: Azure AI Foundry portal
+  - id: csharp
+    title: C#
   - id: javascript
     title: JavaScript
   - id: python