Fix ms subservice metadata

Author: msmimart

articles/active-directory/manage-apps/index.yml

@@ -7,10 +7,10 @@ metadata:
    title: Application management documentation
    description: Azure Active Directory provides secure and seamless access to cloud and on-premises applications. Plus, there's no need to manage passwords. Your end-users can sign in once to access Office 365 and thousands of other applications. Learn how to manage and deploy applications with our quickstarts, tutorials, and guidance.
    ms.service: active-directory
-   ms.subservice: manage-apps
+   ms.subservice: app-mgmt
    ms.workload: identity
    ms.topic: landing-page
-   ms.date: 08/16/2019
+   ms.date: 10/10/2019
    author: msmimart
    ms.author: mimart
    manager: celested