Add more details for ThrottleRateActionBitsPerSecond parameter in New-NetQosPolicy

[YuxuanZhuAtMS]

PR Summary

Add more details for ThrottleRateActionBitsPerSecond parameter in New-NetQosPolicy for some extreme conditions.

We're using New-NetQosPolicy in production to choke some application by setting ThrottleRateActionBitsPerSecond as low as possible, but it turns out that:

• 0 means no rate limiting, will be ignored
• the value will be rounded down to nearest multiple of 8 (e.g. 500 -> 496)

Adding these details into documentation to avoid confusion for others.

PR Checklist

• 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.
• Contributor's Guide: I have read the contributors guide.
• Style: This PR adheres to the style guide.

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[learn-build-service-prod]

Learn Build status updates of commit f2edcf8:

✅ Validation status: passed

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

For more details, please refer to the build report.

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