Update how-to-create-azure-support-request.md

Should be noted that Support Request Contributor is required at the subscription scope, you cannot open support requests if it is assigned at the resource group or resource level scope.

Author: jasonfritts

articles/azure-portal/supportability/how-to-create-azure-support-request.md

@@ -37,7 +37,7 @@ You can get to **Help + support** in the Azure portal. It's available from the A
 
 ### Role-based access control
 
-To create a support request, you must be an admin or be assigned to the [Support Request Contributor](../../role-based-access-control/built-in-roles.md#support-request-contributor) role.
+To create a support request, you must be an admin or be assigned to the [Support Request Contributor](../../role-based-access-control/built-in-roles.md#support-request-contributor) role at the subscription level.
 
 ### Go to Help + support from the global header