merge backup and ASR

Author: pinyuko

articles/reliability/availability-zones-migration-overview.md

@@ -23,8 +23,7 @@ The table below lists each product that offers migration guidance and/or informa
 | **Products**  | 
 | --- | 
 | [Azure Application Gateway (V2)](migrate-app-gateway-v2.md) |
-| [Azure Backup](migrate-recovery-services-vault.md)  | 
-| [Azure Site Recovery](migrate-recovery-services-vault.md) |
+| [Azure Backup and Azure Site Recovery](migrate-recovery-services-vault.md)  | 
 | [Azure Storage account: Blob Storage, Azure Data Lake Storage, Files Storage](migrate-storage.md) |
 | [Azure Storage: Managed Disks](migrate-vm.md)|
 | [Azure Virtual Machines and Azure Virtual Machine Scale Sets](migrate-vm.md)|