Update cdn-create-a-storage-account-with-cdn.md

The following fact comes in cert exam and should be clearly mentioned in the doc:

"Take note that Azure Files can be only accessed through SMB protocol and cannot be put directly behind an Azure CDN which only supports HTTP(80) and HTTPS(443) protocols."

Author: azarboon

articles/cdn/cdn-create-a-storage-account-with-cdn.md

@@ -24,7 +24,7 @@ Sign in to the [Azure portal](https://portal.azure.com) with your Azure account.
 
 ## Create a storage account
 
-A storage account gives access to Azure Storage services. The storage account represents the highest level of the namespace for accessing each of the Azure Storage service components: Azure Blob, Queue, and Table storage. For more information, see [Introduction to Microsoft Azure Storage](../storage/common/storage-introduction.md).
+A storage account gives access to Azure Storage services. The storage account represents the highest level of the namespace for accessing each of the Azure Storage service components: Azure Blob, Queue, and Table storage. Take note that Azure Files can be only accessed through SMB protocol and cannot be put directly behind an Azure CDN which only supports HTTP(80) and HTTPS(443) protocols. For more information, see [Introduction to Microsoft Azure Storage](../storage/common/storage-introduction.md).
 
 To create a storage account, you must be either the service administrator or a coadministrator for the associated subscription.