Merge pull request #287677 from dominicbetts/release-aio-m2-opcua-toc

AIO: Fix OPC UA ToC

Author: v-shils

articles/iot-operations/toc.yml

@@ -39,12 +39,12 @@ items:
         href: discover-manage-assets/howto-manage-assets-remotely.md
       - name: Secure access to your assets
         href: discover-manage-assets/howto-secure-assets.md
-      - name: Message format
-        href: discover-manage-assets/concept-opcua-message-format.md
       - name: OPC UA (connect to your assets)
         items:
         - name: Connector for OPC UA overview
           href: discover-manage-assets/overview-opcua-broker.md
+        - name: Message format
+          href: discover-manage-assets/concept-opcua-message-format.md
         - name: OPC UA application authentication overview
           href: discover-manage-assets/overview-opcua-broker-certificates-management.md
         - name: Configure OPC UA application authentication