Update docfx.json

[JasonWHowell]

Fix broken breadcrumb URL

[learn-build-service-prod]

Learn Build status updates of commit b61c976:

💡 Validation status: suggestions

File	Status	Preview URL	Details
SP-Framework/docfx.json	💡Suggestion		Details

SP-Framework/docfx.json

• Line 51, Column 31: [Suggestion: ms-author-invalid - See documentation] Invalid value for 'ms.author', 'spdevdocs' is not a valid Microsoft alias.

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