update applies to for ltsc, rename lstc/index.md to overview.md, create index.yml for LTSC

windows/whats-new/ltsc/index.yml

@@ -0,0 +1,49 @@
+### YamlMime:Landing
+
+title: What's new in Windows 10 Enterprise LTSC
+summary: Find out about new features and capabilities in the latest release of Windows 10 Enterprise LTSC for IT professionals.
+
+metadata:
+  title: What's new in Windows 10 Enterprise LTSC
+  description: Find out about new features and capabilities in the latest release of Windows 10 Enterprise LTSC for IT professionals.
+  ms.prod: windows-client
+  ms.technology: itpro-fundamentals
+  ms.topic: landing-page
+  ms.collection:
+    - highpri
+    - tier1
+  author: mestew
+  ms.author: mstewart
+  manager: aaroncz
+  ms.date: 05/22/2023
+  localization_priority: medium
+
+landingContent:
+
+  - title: Windows 10 Enterprise LTSC
+    linkLists:
+      - linkListType: overview
+        links:
+          - text: Windows 10 Enterprise LTSC overview
+            url: overview.md
+          - text: What's new in Windows 10 Enterprise LTSC 2021
+            url: whats-new-windows-10-2021.md
+          - text: What's new in Windows 10 Enterprise LTSC 2019
+            url: whats-new-windows-10-2019.md
+          - text: What's new in Windows 10 Enterprise LTSC 2016
+            url: whats-new-windows-10-2016.md
+          - text: What's new in Windows 10 Enterprise LTSC 2015
+            url: whats-new-windows-10-2015.md
+
+  - title: Learn more
+    linkLists:
+      - linkListType: overview
+        links:
+          - text: Windows release health dashboard
+            url: /windows/release-health/
+          - text: Windows 10 update history
+            url: https://support.microsoft.com/topic/windows-10-update-history-857b8ccb-71e4-49e5-b3f6-7073197d98fb
+          - text: Windows features we're no longer developing
+            url: deprecated-features.md
+          - text: Features and functionality removed in Windows
+            url: removed-features.md

windows/whats-new/ltsc/overview.md

@@ -1,5 +1,5 @@
 ---
-title: Windows 10 Enterprise LTSC
+title: Windows 10 Enterprise LTSC overview
 description: New and updated IT Pro content about new features in Windows 10, LTSC (also known as Windows 10 LTSB).
 ms.prod: windows-client
 author: mestew