Move concepts lower in ToC

Author: johndowns

articles/reliability/TOC.yml

@@ -327,16 +327,6 @@
       href: reliability-notification-hubs.md
     - name: Azure SignalR Service
       href: ../azure-signalr/signalr-concept-disaster-recovery.md?toc=/azure/reliability/toc.json&bc=/azure/reliability/breadcrumb/toc.json
-- name: Reliability concepts
-  items:
-  - name: Business continuity, high availability, and disaster recovery
-    href: concept-business-continuity-high-availability-disaster-recovery.md
-  - name: Redundancy, replication, and backup
-    href: concept-redundancy-replication-backup.md
-  - name: Failover and failback
-    href: concept-failover-failback.md
-  - name: Shared responsibility for reliability
-    href: concept-shared-responsibility.md
 - name: Azure regions
   items:
   - name: What are Azure regions?
@@ -417,6 +407,16 @@
         href: migrate-vm.md
       - name: Workload - Azure Kubernetes and MySQL
         href: migrate-workload-aks-mysql.md
+- name: Reliability concepts
+  items:
+  - name: Business continuity, high availability, and disaster recovery
+    href: concept-business-continuity-high-availability-disaster-recovery.md
+  - name: Redundancy, replication, and backup
+    href: concept-redundancy-replication-backup.md
+  - name: Failover and failback
+    href: concept-failover-failback.md
+  - name: Shared responsibility for reliability
+    href: concept-shared-responsibility.md
 - name: Resources
   items:
   - name: Azure service incident response