Add ms.service

Author: gitName

learn-pr/azure/place-scene-objects/index.yml

@@ -7,6 +7,7 @@ metadata:
   author: marlenaklein-msft
   ms.author: lolab
   ms.topic: module
+  ms.service: hololens
 title: Place a Mars Rover object in the scene and work with grids and intelligent object tracking
 summary: This course provides you with an understanding of placing objects and tracking objects using solvers.
 abstract: |