Fix LVIS dataset links

[glenn-jocher]

@Laughing-q fixing some broken links here from the failed checks

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhanced LVIS dataset documentation with updated links and added visual examples.

📊 Key Changes

• Updated the LVIS dataset description for clarity.
• Included a center-aligned image to showcase examples from the LVIS dataset.
• Streamlined image links and corrected image display issues.
• Updated the LVIS dataset website link for accuracy.

🎯 Purpose & Impact

• Improved Clarity: Simplifies understanding of the LVIS dataset's significance in computer vision research.
• Visual Examples: Helps users visualize what the dataset offers, potentially increasing engagement and usage.
• Link Accuracy: Ensures users can easily find additional information, supporting further research and development.

These changes aim to make the LVIS dataset documentation more informative and user-friendly, benefiting both new learners and seasoned researchers in the computer vision field.👁️‍🗨️🔍

[glenn-jocher]