Add toc.yml to exclude list in docfx.json

[Taojunshen]

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[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 issues. Other issues are also a high priority. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

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[learn-build-service-prod]

Learn Build status updates of commit 0b47f6c:

💡 Validation status: suggestions

File	Status	Preview URL	Details
docfx.json	💡Suggestion		Details

docfx.json

• Line 1, Column 1: [Suggestion: uhf-header-id-missing - See documentation] uhfHeaderId should not be null; specify the uhfHeaderId in global metadata of docfx.json file.
• Line 82, Column 44: [Suggestion: ms-author-invalid - See documentation] Invalid value for 'ms.author', 'v-jysur' is not a valid Microsoft alias.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.