Update azure-stack-tenant-resource-usage-api.md

Author: sethmanheim

azure-stack/operator/azure-stack-tenant-resource-usage-api.md

@@ -3,8 +3,7 @@ title: Tenant resource usage APIs reference
 titleSuffix: Azure Stack
 description: Reference for resource usage APIs, which retrieve Azure Stack Hub usage information.
 author: sethmanheim
-
-ms.topic: how-to
+ms.topic: reference
 ms.date: 07/21/2021
 ms.author: sethm
 ms.reviewer: alfredop