Update evaluate-mdav-using-gp.md

[YongRhee-MSFT]

Made changes. Removed NP policies not in ADMX yet, and changed it to the Powershell cmdlet.

[learn-build-service-prod]

Learn Build status updates of commit 942fd8a:

💡 Validation status: suggestions

File	Status	Preview URL	Details
defender-endpoint/evaluate-mdav-using-gp.md	💡Suggestion		Details

defender-endpoint/evaluate-mdav-using-gp.md

• Line 189, Column 50: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/defender-endpoint/update-agent-mma-windows#upgrade-to-the-new-unified-agent-for-defender-for-endpoint' will be broken in isolated environments. Replace with a relative link.

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