Update dependency ultralytics to v8.2.81

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ultralytics	8.2.80 -> 8.2.81

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Release Notes

ultralytics/ultralytics (ultralytics)

v8.2.81: - ultralytics 8.2.81 fix HUB missing 'best.pt' resumed checkpoint upload (#​15754)

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🌟 Summary

The v8.2.81 release of Ultralytics YOLO introduces significant documentation improvements and a refined model upload process to enhance usability and reliability for machine learning practitioners.

📊 Key Changes

• Documentation Enhancements: Updated how code examples and citations are presented across various dataset guides to improve readability and user accessibility.
• Model Upload Process: Improved handling of model uploads with added safeguards and informative logging, particularly in transient environments like Google Colab.
• Technical Adjustment: Corrected bounding box conversion details in the results module, changing from top-left coordinates to center-point coordinates.

🎯 Purpose & Impact

• Easier Understanding and Use: The new documentation format with examples in both Python and CLI makes it more straightforward for users to implement various datasets in their projects.
• Robust Model Management: Enhanced model upload functionality ensures continuity and mitigates issues in cloud-based environments, promoting more reliable training sessions.
• Accurate Representation: The bounding box conversion adjustment aligns technical descriptions with actual functionalities, ensuring users correctly apply transformations.

What's Changed

• Add https://youtu.be/WwXnljc7ZUM to docs by @​RizwanMunawar in https://github.com/ultralytics/ultralytics/pull/15751
• Improve Docs dataset layout issues by @​jk4e in https://github.com/ultralytics/ultralytics/pull/15696
• Fix xywh docstring by @​Laughing-q in https://github.com/ultralytics/ultralytics/pull/15765
• Ensure matplotlib backend gets reset with plt_settings by @​rschroll in https://github.com/ultralytics/ultralytics/pull/15759
• ultralytics 8.2.81 fix HUB missing 'best.pt' resumed checkpoint upload by @​glenn-jocher in https://github.com/ultralytics/ultralytics/pull/15754

New Contributors

• @​rschroll made their first contribution in https://github.com/ultralytics/ultralytics/pull/15759

Full Changelog: ultralytics/ultralytics@v8.2.80...v8.2.81

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