Update create-custom-topic.md

Author: cmcclister

articles/event-grid/create-custom-topic.md

@@ -10,7 +10,7 @@ ms.custom: mode-ui
 This article shows how to create a custom topic or a domain in Azure Event Grid. 
 
 ## Prerequisites
-If you new to Azure Event Grid, read through [Event Grid overview](overview.md) before starting this tutorial.
+If you're new to Azure Event Grid, read through [Event Grid overview](overview.md) before starting this tutorial.
 
 [!INCLUDE [event-grid-register-provider-portal.md](../../includes/event-grid-register-provider-portal.md)]
 
@@ -100,4 +100,4 @@ See the following samples to learn about publishing events to and consuming even
 - [Azure Event Grid samples for Java](/samples/azure/azure-sdk-for-java/eventgrid-samples/)
 - [Azure Event Grid samples for Python](/samples/azure/azure-sdk-for-python/eventgrid-samples/)
 - [Azure Event Grid samples for JavaScript](/samples/azure/azure-sdk-for-js/eventgrid-javascript/)
-- [Azure Event Grid samples for TypeScript](/samples/azure/azure-sdk-for-js/eventgrid-typescript/)
+- [Azure Event Grid samples for TypeScript](/samples/azure/azure-sdk-for-js/eventgrid-typescript/)