Update Dockerfile-cpu to libpython3-dev

[glenn-jocher]

Signed-off-by: Glenn Jocher glenn.jocher@ultralytics.com

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Updated Python development package in the YOLOv5 CPU Dockerfile.

📊 Key Changes

• Changed the installed Python development package from libpython3.8-dev to a more generic libpython3-dev.

🎯 Purpose & Impact

• Purpose: This change seems aimed at generalizing the Python development package, making the Dockerfile less specific to Python 3.8 and potentially allowing for broader compatibility with different Python 3 versions.
• Impact: Users building the YOLOv5 Docker image on CPU systems may benefit from increased flexibility and reduced issues related to Python version dependencies. This can lead to a smoother setup and use experience across various environments. 🐍🚀