Add check_requirements(('pycocotools>=2.0',))

[glenn-jocher]

Add check_requirements(('pycocotools>=2.0',))

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Updated Objects365 dataset configuration with dependency checks.

📊 Key Changes

• Added check_requirements function to enforce the presence of necessary packages.
• Included pycocotools version check within the dataset download script.

🎯 Purpose & Impact

• Consistency: Ensures users have the correct version of pycocotools before running the download script.
• User Experience: Prevents potential errors that could occur from missing or outdated dependencies, leading to a smoother workflow.