Update deploy-chat-web-app.md

fix link

Author: sdgilley

articles/ai-studio/tutorials/deploy-chat-web-app.md

@@ -155,4 +155,4 @@ To avoid incurring unnecessary Azure costs, you should delete the resources you
 ## Related content
 
 - [Get started building a chat app using the prompt flow SDK](../quickstarts/get-started-code.md)
-- [Build a custom chat app with the Azure AI SDK.](./copilot-sdk-build-rag.md).
+- [Build a custom chat app with the Azure AI SDK.](./copilot-sdk-create-resources.md).