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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• [ ] Descriptive Title: This PR's title is a synopsis of the changes it proposes.
• [ ] Summary: This PR's summary describes the scope and intent of the change.
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[learn-build-service-prod[bot]]

Learn Build status updates of commit 63ee6cb:

:white_check_mark: Validation status: passed

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

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