updated TOC

Author: MGoedtel

articles/azure-arc/servers/toc.yml

@@ -4,8 +4,10 @@
   items:
   - name: About Azure Arc-enabled servers
     href: overview.md
-  - name: What's new with Connected Machine agent
+  - name: What's new with Connected Machine agent?
     href: agent-release-notes.md
+  - name: Archive for Connected Machine agent release notes
+    href: agent-release-notes-archive.md
 - name: Quickstarts
   items:
   - name: Enable Arc-enabled servers agent