Reverted old change

Author: kevinvngo

articles/synapse-analytics/sql-data-warehouse/toc.yml

@@ -32,6 +32,7 @@
     - name: PowerShell
       href: create-data-warehouse-powershell.md
   - name: Load data
+    items: 
     - name: COPY statement
       href: quickstart-bulk-load-copy-tsql.md
   - name: Scale