Update confidential-vm-overview.md

Checked with the PG team, Ultra disks are supported with confidential VMs, hence updating this document as currently it states that ultra disks feature is not supported on confidential VMs

Author: Shivangi-upamanyu

articles/confidential-computing/confidential-vm-overview.md

@@ -31,6 +31,7 @@ Azure confidential VMs offer strong security and confidentiality for tenants. Th
 - Secure key release with cryptographic binding between the platform's successful attestation and the VM's encryption keys.
 - Dedicated virtual [Trusted Platform Module (TPM)](/windows/security/information-protection/tpm/trusted-platform-module-overview) instance for attestation and protection of keys and secrets in the virtual machine.
 - Secure boot capability similar to [Trusted launch for Azure VMs](../virtual-machines/trusted-launch.md)
+- Ultra disk capability is supported on confidential VMs
 
 ## Confidential OS disk encryption
 
@@ -123,7 +124,6 @@ Confidential VMs *don't support*:
 - Microsoft Azure Virtual Machine Scale Sets with Confidential OS disk encryption enabled
 - Limited Azure Compute Gallery support
 - Shared disks
-- Ultra disks
 - Accelerated Networking
 - Live migration
 - Screenshots under boot diagnostics