add highpri coll metadata

windows/application-management/add-apps-and-features.md

@@ -12,6 +12,7 @@ ms.date: 08/30/2021
 ms.reviewer: 
 manager: dougeby
 ms.topic: article
+ms.collection: highpri
 ---
 
 # Add or hide features on the Windows client OS

windows/application-management/apps-in-windows-10.md

@@ -11,6 +11,7 @@ ms.author: mandia
 author: MandiOhlinger
 ms.localizationpriority: medium
 ms.topic: article
+ms.collection: highpri
 ---
 
 # Overview of apps on Windows client devices

windows/application-management/index.yml

@@ -10,7 +10,9 @@ metadata:
   ms.service: windows-10 #Required; service per approved list. service slug assigned to your service by ACOM.
   ms.subservice: subservice
   ms.topic: landing-page # Required
-  ms.collection: windows-10
+  ms.collection: 
+    - windows-10
+    - highpri
   author: greg-lindsay #Required; your GitHub user alias, with correct capitalization.
   ms.author: greglin #Required; microsoft alias of author; optional team alias.
   ms.date: 08/24/2021 #Required; mm/dd/yyyy format.