Add note highlighting breaking change

Author: craigshoemaker

articles/azure-functions/functions-bindings-sendgrid.md

@@ -29,6 +29,9 @@ The SendGrid bindings are provided in the [Microsoft.Azure.WebJobs.Extensions.Se
 
 The SendGrid bindings are provided in the [Microsoft.Azure.WebJobs.Extensions.SendGrid](https://www.nuget.org/packages/Microsoft.Azure.WebJobs.Extensions.SendGrid) NuGet package, version 3.x. Source code for the package is in the [azure-webjobs-sdk-extensions](https://github.com/Azure/azure-webjobs-sdk-extensions/blob/master/src/WebJobs.Extensions.SendGrid/) GitHub repository.
 
+> [!NOTE]
+> Version 1.x creates the topic or subscription configured in the `ServiceBusTrigger` (if it does not exist) but version 2.x of the package does not. Version 2.x is based on [Microsoft.Azure.ServiceBus](https://www.nuget.org/packages/Microsoft.Azure.ServiceBus) that does not handle queue management.
+
 [!INCLUDE [functions-package-v2](../../includes/functions-package-v2.md)]
 
 ## Example