Add YOLO comparison plots

[glenn-jocher]

Speed vs mAP and Size vs mAP comparison plots on A100.

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Improvements to visualization and responsive design in Ultralytics README.

📊 Key Changes

• Updated the banner image link to be responsive (width changes to 100% of the container).
• Added a new comparison image to showcase YOLO model performance.

🎯 Purpose & Impact

• 🖼️ Enhanced readability: The use of the full container width for the banner ensures better visibility across various screen sizes.
• 🔍 Easier comparison: Introducing the YOLO comparison plots provides users a quick visual reference to the performance of different YOLO models, aiding in model selection.