fix zone groups warning for langchain doc

Author: samuel100

articles/ai-foundry/foundry-local/how-to/how-to-use-langchain-with-foundry-local.md

@@ -11,7 +11,7 @@ ms.reviewer: eneros
 ms.author: eneros
 author: eneros
 ms.custom: build-2025
-zone_pivot_groups: foundry-local-sdk
+zone_pivot_groups: foundry-local-langchain
 #customer intent: As a developer, I want to get started with Foundry Local so that I can run AI models locally.
 ---
 

zone-pivots/zone-pivot-groups.yml

@@ -1299,16 +1299,14 @@ groups:
     title: C#
   - id: programming-language-rust
     title: Rust
-- id: foundry-local-sdk-with-csharp
+- id: foundry-local-langchain
   title: Programming languages
   prompt: Choose a programming language
   pivots:
   - id: programming-language-javascript
     title: JavaScript
   - id: programming-language-python
     title: Python
-  - id: programming-language-csharp
-    title: C#
 # Owner: haileytapia
 - id: search-get-started-agentic-retrieval
   title: Python and REST