Agent governance still over strict in PR.body

[QuantumMisaka]

Describe the Testing Issue

Lots of PR failed in agent goverance test by:

| error | PR metadata completeness | `pull_request.body` | missing sections: Linked Issue, Unit Tests and/or Case Tests for my changes, What's changed?, Governance Checklist, INPUT Parameter Changes, Core 

Which should be warning but not error.

Additional Context

No response

Task list for Issue attackers (only for developers)

• Understand the testing issue described by the developer.
• Review the specific test case, expected and actual results, and any error messages.
• Identify the root cause of the test failure or issue.
• If a possible solution is suggested, evaluate its feasibility and effectiveness.
• Implement a fix for the test failure or issue, or create a new test case if needed.
• Verify that the fix resolves the testing issue and the test case passes.
• Review and update any relevant documentation, such as test plans or user guides.
• Ensure the testing issue is resolved and close the ticket.
• Share any lessons learned or best practices with the team to prevent similar issues in the future.