Update manage-result-sources.md

[edixon-github]

Announcing the retirement of Hybrid Federated Search and Remote Protocol options for SharePoint in Microsoft 365

[learn-build-service-prod]

Learn Build status updates of commit edf5fa0:

💡 Validation status: suggestions

File	Status	Preview URL	Details
SharePoint/SharePointOnline/manage-result-sources.md	💡Suggestion		Details

SharePoint/SharePointOnline/manage-result-sources.md

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