Update New-VMSwitch.md

[ejsiron]

Changed the description of -MinimumBandwidthMode to indicate that it defaults to "Absolute", not "Weight". The documentation has been incorrect on that for years. The default has always been "Absolute".

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[learn-build-service-prod]

Learn Build status updates of commit 0f19ed3:

✅ Validation status: passed

File	Status	Preview URL	Details
docset/winserver2025-ps/hyper-v/New-VMSwitch.md	✅Succeeded	View (WindowsServer2025-ps)

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