Update openapi-authoring-automated-guidelines.md

[jianyexi]

Changes:
update documentation for R2005
add new rule: MissingTypeObject

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[openapi-pipeline-app]

Swagger Validation Report

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Validation passes for SemanticValidation.

️️✔️Cross-Version Breaking Changes succeeded [Detail] [Expand]

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Validation passes for SDKTrack2Validation

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_{Posted by Swagger Pipeline | How to fix these errors?}

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Swagger pipeline restarted successfully, please wait for status update in this comment.

[ghost]

Hi, @jianyexi. Your PR has no update for 14 days and it is marked as stale PR. If no further update for over 14 days, the bot will close the PR. If you want to refresh the PR, please remove no-recent-activity label.

[ghost]

Hi, @jianyexi. The PR will be closed since the PR has no update for 28 days. If you still need the PR review to proceed, please reopen it and @ mention PR assignee.

[jianyexi]

/azp run

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Azure Pipelines successfully started running 1 pipeline(s).