Normalized mosaic plotting bug fix

[glenn-jocher]

This PR attempts to fix issue #1623. A tolerance is introduced to the normalization determination of labels, which previously accidentally classified labels as non-normalized due to numerical precision issues.

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Improved bounding box normalization tolerance in plotting utility.

📊 Key Changes

• Adjusted the condition to check for normalized bounding box coordinates with a slight tolerance (from exactly 1 to 1.01).

🎯 Purpose & Impact

• The update allows for small numerical inaccuracies when plotting normalized bounding box coordinates.
• Users will benefit from more robust visualizations, especially when coordinates may not be perfectly normalized due to floating-point arithmetic limitations. 🎨✨

[glenn-jocher]

Problem solved! :)