Update New-Volume.md

[PhilipElder]

I deleted an incorrect reference to New-VirtualDisk for a parameter that does not belong to New-Volume.

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[learn-build-service-prod]

Learn Build status updates of commit 63ee6cb:

✅ Validation status: passed

File	Status	Preview URL	Details
docset/winserver2022-ps/storage/New-Volume.md	✅Succeeded	View (WindowsServer2022-ps)

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