fixing placement

Author: batamig

articles/defender-for-iot/organizations/TOC.yml

@@ -301,10 +301,10 @@
       href: how-to-troubleshoot-the-sensor-and-on-premises-management-console.md
 - name: Reference
   items:
+  - name: Data retention
+    href: references-data-retention.md
   - name: OT monitoring appliances
     items:
-    - name: Data retention
-      href: references-data-retention.md
     - name: Overview
       href: appliance-catalog/index.yml
       displayName: appliance catalog