Group Data Product articles under dedicated node

Author: rcdun

articles/operator-insights/TOC.yml

@@ -11,10 +11,12 @@
     href: ingestion-agent-release-notes.md
 - name: Planning
   items:
-  - name: Quality of Experience - Affirmed MCC Data Products
-    href: concept-mcc-data-product.md
-  - name: Monitoring - Affirmed MCC Data Product
-    href: concept-monitoring-mcc-data-product.md
+  - name: Data Products
+    items:
+    - name: Quality of Experience - Affirmed MCC
+      href: concept-mcc-data-product.md
+    - name: Monitoring - Affirmed MCC
+      href: concept-monitoring-mcc-data-product.md
   - name: Business continuity and disaster recovery
     href: business-continuity-disaster-recovery.md
   - name: Data quality and data monitoring