Update investigate-alerts.md

[amitkumart]

Hilde Alert Feature is available only for MDE Alert for now. As received ICM from customer that they were trying to Hide the MDO alert, however that is not a supported, hence Document needs to be updated.

Related ICM
https://portal.microsofticm.com/imp/v5/incidents/details/584016612/summary https://portal.microsofticm.com/imp/v5/incidents/details/476725879/summary

[learn-build-service-prod]

Learn Build status updates of commit 6375a5f:

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[learn-build-service-prod]

Learn Build status updates of commit b0cc032:

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[denisebmsft]

Hello @amitkumart. Please review and sign our contributor license agreement (CLA) so we can merge your pull request. And thanks!

[amitkumart]

@denisebmsft I agree with all License Terms

[learn-build-service-prod]

Learn Build status updates of commit e94b07d:

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[learn-build-service-prod]

Learn Build status updates of commit 2d60ce1:

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[denisebmsft]

Moved this pull request to our private repository. https://github.com/MicrosoftDocs/defender-docs-pr/pull/2479