Update manage-security-alerts.md

[rlitinsky]

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[learn-build-service-prod]

Learn Build status updates of commit 8af5811:

💡 Validation status: suggestions

File	Status	Preview URL	Details
ATPDocs/manage-security-alerts.md	💡Suggestion		Details

ATPDocs/manage-security-alerts.md

• Line 90, Column 132: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/defender-xdr/investigate-alerts?tabs=settings#alert-sources' will be broken in isolated environments. Replace with a relative link.

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[DeCohen]

#sign-off

[garycentric]

@rlitinsky Please work with the private repo, defender-docs-pr, not the public. The private repos have more thorough checks, more support for Microsoft contributors, and a shorter path to being published. If you need help, please post in https://aka.ms/AskAnAdmin in Teams. You can also find guidance in the authoring guide in Get started for contributors with write access and Quickly update an article using the Microsoft Learn Editor or GitHub.com.