reorg disaster recovery topics

Author: Patti Short

articles/azure-vmware/toc.yml

@@ -74,7 +74,7 @@
     href: windows-server-failover-cluster.md
   - name: Reset vSphere credentials
     href: reset-vsphere-credentials.md
-  - name: Disaster recovery/DRaaS
+  - name: Disaster recovery
     items:
     - name: Deploy disaster recovery for VMs
       href: disaster-recovery-for-virtual-machines.md