update alignment

Author: vhorne

articles/networking/security/index.yml

@@ -174,7 +174,10 @@ additionalContent:
               url: /azure/architecture/solution-ideas/articles/azure-security-build-first-layer-defense
             - text: Secure and govern workloads with network-level segmentation
               url: /azure/architecture/reference-architectures/hybrid-networking/network-level-segmentation
-        - title: Networking services
+
+    - title: Networking services
+      items:
+        - title: Related services
           links:
            - text: Load balancing and Content Delivery
              url: /azure/networking/load-balancer-content-delivery/