Merge pull request #301637 from khdownie/kendownie062025

AFS extension docs

Author: denrea

articles/storage/file-sync/TOC.yml

@@ -35,6 +35,8 @@
     href: file-sync-replace-server.md
   - name: Replace drive of an Azure File Sync server
     href: file-sync-replace-drive.md
+  - name: Install Azure File Sync agent extension on Arc-enabled Windows Servers
+    href: file-sync-extension.md    
 - name: Cloud tiering
   items:
   - name: Cloud tiering overview