Update device-discovery-faq.md

[miashapan]

Removed OT specific protocol

[learn-build-service-prod]

Learn Build status updates of commit 1bc55fa:

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[learn-build-service-prod]

Learn Build status updates of commit c53fd91:

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[denisebmsft]

Thank you @miashapan

[learn-build-service-prod]

Learn Build status updates of commit a305757:

✅ Validation status: passed

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defender-endpoint/device-discovery-faq.md	✅Succeeded

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[learn-build-service-prod]

Learn Build status updates of commit 367765d:

✅ Validation status: passed

File	Status	Preview URL	Details
defender-endpoint/device-discovery-faq.md	✅Succeeded

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For any questions, please:

• Try searching the learn.microsoft.com contributor guides
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