Update availability.md

-------
cc: @ju-shim

Author: mimckitt

articles/virtual-machine-scale-sets/availability.md

@@ -1,13 +1,15 @@
 ---
 title: Availability options for Azure virtual machine scale sets
 description: Learn about the availability features for running Windows virtual machine scale sets in Azure
-author: ju-shim
-ms.author: jushiman
-ms.service: virtual-machine-scale-sets
+author: mimckitt
+ms.author: mimckitt
 ms.topic: conceptual
-ms.tgt_pltfrm: vm-windows
-ms.workload: infrastructure-services
+ms.service: virtual-machine-scale-sets
+ms.subservice: availability
 ms.date: 11/05/2019
+ms.reviewer: jushiman
+ms.custom: mimckitt
+
 ---
 
 # Availability options for virtual machines in Azure