Update backup-vault-overview.md

In here it should be clearly stated in this main page that Backup Vault supports Azure Blob; because currently the only way to find this is to check its dedicated page on doc which requires pre-existing knowledge.

Author: azarboon

articles/backup/backup-vault-overview.md

@@ -10,7 +10,7 @@ ms.author: v-abhmallick
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 # Backup vaults overview
 
-This article describes the features of a Backup vault. A Backup vault is a storage entity in Azure that houses backup data for certain newer workloads that Azure Backup supports. You can use Backup vaults to hold backup data for various Azure services, such Azure Database for PostgreSQL servers and newer workloads that Azure Backup will support. Backup vaults make it easy to organize your backup data, while minimizing management overhead. Backup vaults are based on the Azure Resource Manager model of Azure, which provides features such as:
+This article describes the features of a Backup vault. A Backup vault is a storage entity in Azure that houses backup data for certain newer workloads that Azure Backup supports. You can use Backup vaults to hold backup data for various Azure services, such as Azure Blob, Azure Database for PostgreSQL servers and newer workloads that Azure Backup will support. Backup vaults make it easy to organize your backup data, while minimizing management overhead. Backup vaults are based on the Azure Resource Manager model of Azure, which provides features such as:
 
 - **Enhanced capabilities to help secure backup data**: With Backup vaults, Azure Backup provides security capabilities to protect cloud backups. The security features ensure you can secure your backups, and safely recover data, even if production and backup servers are compromised. [Learn more](backup-azure-security-feature.md)