Update OpenAPI 3.1 Descriptions

[github-openapi-bot]

👋 humans. This PR updates the OpenAPI 3.1 description with the latest changes. ✨

[Copilot]

Pull request overview

This PR updates the OpenAPI 3.1 descriptions for the GitHub API with schema and example enhancements for repository pull request policies, issue comment pinning, security configurations, and project field iterations.

Changes:

• Added pull_request_creation_policy field to repository schemas to control PR creation permissions
• Introduced pinned_comment field to issue schemas and updated related examples
• Added security_configuration_id to bypass reviewer specifications
• Set additionalProperties: false on project iteration field objects

Reviewed changes

Copilot reviewed 5 out of 64 changed files in this pull request and generated no comments.

File	Description
descriptions-next/api.github.com/api.github.com.yaml	Added new schema fields and examples for YAML format
descriptions-next/api.github.com/api.github.com.json	Added new schema fields and examples for JSON format
descriptions-next/api.github.com/api.github.com.2022-11-28.yaml	Added new schema fields and examples for versioned YAML format
descriptions-next/api.github.com/api.github.com.2022-11-28.json	Added new schema fields and examples for versioned JSON format

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