Update web-content-filtering.md

[ericlaw1979]

Remove incorrect claim about domain card.

[learn-build-service-prod]

Learn Build status updates of commit 6277c46:

✅ Validation status: passed

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[learn-build-service-prod]

Learn Build status updates of commit 88a1dbe:

✅ Validation status: passed

File	Status	Preview URL	Details
defender-endpoint/web-content-filtering.md	✅Succeeded

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[denisebmsft]

Thank you @ericlaw1979

[learn-build-service-prod]

Learn Build status updates of commit 45d0f57:

✅ Validation status: passed

File	Status	Preview URL	Details
defender-endpoint/web-content-filtering.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
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