Update ci-testing.yml benchmarks to Python 3.10

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Upgraded Python requirement for CI testing from 3.9 to 3.10.

📊 Key Changes

• Updated the Python version used in continuous integration (CI) testing from 3.9 to 3.10.

🎯 Purpose & Impact

• 🔍 Ensures compatibility: Testing the codebase with the latest Python version ensures that YOLOv5 remains compatible with newer Python environments.
• 🚀 Potential performance improvements: Newer Python versions may include optimizations that could improve the performance or efficiency of the software.
• ✨ Forward compatibility: Prepares users and developers for a future transition to Python 3.10 as a minimum supported version, promoting the use of up-to-date and supported Python versions.