fxt: updating ms.topic from overview to conceptual

Author: ronhogue

articles/fxt-edge-filer/fxt-specs.md

@@ -3,7 +3,7 @@ title: Microsoft Azure FXT Edge Filer specifications | Microsoft Docs
 description: Physical and environmental specifications for Azure FXT Edge Filer hardware
 author: ekpgh
 ms.service: fxt-edge-filer
-ms.topic: overview
+ms.topic: conceptual
 ms.date: 06/20/2019
 ms.author: rohogue
 ---