docs: renew TestMu AI sponsor

[metcoder95]

Overview

Category

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation
• Maintenance (refactoring, dependency updates, etc.)

Contribution Checklist

• I have reviewed the guidelines for this project.
• I agree to follow the Code of Conduct.
• My code adheres to the project's style and conventions.
• I have added tests to cover my changes.
• All tests passed locally.
• I have updated relevant documentation.

DCO Sign-off

• I certify that I have the right to submit this contribution under the open source license (DCO 1.1).