Update README.md with Discord badge

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhancements to data handling and community engagement for Ultralytics xView Docker project.

📊 Key Changes

• README Update: Added a Discord badge to enhance community engagement 🤝.
• Code Reordering: Swapped the order of imports in utils/datasets.py for consistency 🔄.
• Utils Refinement: Added blank lines for readability and rearranged import statements for better organization in utils/utils.py 🛠.

🎯 Purpose & Impact

• Community Engagement: The addition of the Discord badge in the README aims to foster a more vibrant and accessible community for users and developers 👥.
• Enhanced Readability and Maintenance: Reorganizing and refining code, including rearrangement of import statements and improving whitespace, helps in maintaining cleaner code, making it easier for current and future developers to navigate and enhance the project 🔍.
• Potential Impact: These changes, while seemingly minor, are steps towards a more organized and community-focused project. Users may find it easier to get involved and obtain support, while developers benefit from more structured code 🚀.