Update TOC.yml

Author: chuckedmonson

microsoft-365/syntex/TOC.yml

@@ -236,7 +236,7 @@
     - name: Microsoft 365 Archive
       href: /microsoft-365/archive
 
-    - name: Microsoft 365 Backup (Preview)
+    - name: Microsoft 365 Backup
       href: /microsoft-365/backup
 
     - name: Annotations