Broken link fixed

Author: pritamso

articles/communication-services/quickstarts/email/includes/send-email-net.md

@@ -291,7 +291,7 @@ dotnet run
 
 ### Sample code
 
-You can download the sample app from [GitHub](https://github.com/Azure-Samples/communication-services-dotnet-quickstarts/tree/main/SendEmailAdvanced/ManualPolling)
+You can download the sample app from [GitHub](https://github.com/Azure-Samples/communication-services-dotnet-quickstarts/tree/main/SendEmailAdvanced/SendEmailWithManualPollingForStatus)
 
 ### Send an email message using the object model to construct the email payload