Update network-protection.md

[ericlaw1979]

Simplify documentation; clarify that Edge policy controls behavior inside Edge

[learn-build-service-prod]

Learn Build status updates of commit b4563c4:

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[denisebmsft]

Thank you @ericlaw1979

[learn-build-service-prod]

Learn Build status updates of commit 9c90dfd:

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[learn-build-service-prod]

Learn Build status updates of commit 26254fb:

✅ Validation status: passed

File	Status	Preview URL	Details
defender-endpoint/network-protection.md	✅Succeeded

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For any questions, please:

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