Update deployment-virtual.md - reducing data drives from six to four

reduced virtual disks from six to four.
The requirement for Azure Stack HCI is actually two disks but OEMs follow the guidance of having a min. of four.

Goal: reducing the lab footprint.

See data drives in System Requirements
https://learn.microsoft.com/en-us/azure-stack/hci/concepts/system-requirements-23h2#server-and-storage-requirements

Author: Karl-WE

azure-stack/hci/deploy/deployment-virtual.md

@@ -196,15 +196,13 @@ Follow these steps to create an example VM named `Node1` using PowerShell cmdlet
 
 1. Attach drives to the newly created VHDXs for the VM. In these commands, six VHDs located in the `C:\vms\Node1` directory and named `s2d1.vhdx` through `s2d6.vhdx` are added to `Node1`. Each `Add-VMHardDiskDrive` command adds one VHD to the VM, so the command is repeated six times with different `-Path` parameter values.
 
-    Afterwards, the `Node1` VM has six VHDs attached to it. These VHDXs are used to enable Storage Spaces Direct on the VM, which are required for Azure Stack HCI deployments:
+    Afterwards, the `Node1` VM has four VHDs attached to it. These VHDXs are used to enable Storage Spaces Direct on the VM, which are required for Azure Stack HCI deployments:
 
    ```PowerShell
     Add-VMHardDiskDrive -VMName "Node1" -Path "C:\vms\Node1\s2d1.vhdx"
     Add-VMHardDiskDrive -VMName "Node1" -Path "C:\vms\Node1\s2d2.vhdx"
     Add-VMHardDiskDrive -VMName "Node1" -Path "C:\vms\Node1\s2d3.vhdx"
     Add-VMHardDiskDrive -VMName "Node1" -Path "C:\vms\Node1\s2d4.vhdx"
-    Add-VMHardDiskDrive -VMName "Node1" -Path "C:\vms\Node1\s2d5.vhdx"
-    Add-VMHardDiskDrive -VMName "Node1" -Path "C:\vms\Node1\s2d6.vhdx"
     ```
 
 1. Disable time synchronization: