Update call-automation-ai-csharp.md

fix broken link for dev-tunnels

Author: valindrae

articles/communication-services/samples/includes/call-automation-ai-csharp.md

@@ -25,7 +25,7 @@ This Azure Communication Services Call Automation AI sample demonstrates how to
 - Create an Azure account with an active subscription. For details, see [Create an account for free](https://azure.microsoft.com/free/)
 - Create an Azure Communication Services resource. For details, see [Create an Azure Communication Resource](../../quickstarts/create-communication-resource.md?tabs=windows&pivots=platform-azp). You need to record your resource **connection string** for this sample.
 - A Calling-enabled telephone number. [Get a phone number](../../quickstarts/telephony/get-phone-number.md).
-- Azure Dev Tunnels CLI. For details, see  [Enable dev tunnel](https://docs.tunnels.api.visualstudio.com/cli)
+- Azure Dev Tunnels CLI. For details, see  [Enable dev tunnel](/azure/developer/dev-tunnels/get-started)
 - Create an Azure AI services resource. For details, see [Create an Azure AI services Resource](/azure/ai-services/multi-service-resource)
 - An Azure OpenAI Resource and Deployed Model. See [instructions](/azure/ai-services/openai/how-to/create-resource?pivots=web-portal).