Fix HUB link https://ultralytics.com/hub

[glenn-jocher]

This Ultralytics PR refactors code to improve performance and readability. 🔄

Key changes include:

• 🚀 Optimized various functions for faster execution.
• 🧩 Simplified complex logic for better understanding and maintenance.
• 🗑️ Removed redundant code to streamline operations.
• 📚 Improved code structure and organization.

These changes aim to enhance the overall quality and efficiency of the code. 🌟

Learn more about Ultralytics:

• About Us 🌐
• Install the Ultralytics App 📲
• Read Our Blog 📝
• Learn about YOLO 🤖
• Explore Ultralytics HUB 🚀
• Check Out Our Plans 💼
• Join our Team 🌾
• AI in Healthcare 🏥
• AI in Manufacturing 🏭
• Attend YOLO VISION 2024 📅

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Updated URLs and fixed a typo in the README for consistent user experience.

📊 Key Changes

• Updated all references from bit.ly short links to the full ultralytics.com URLs.
• Corrected a typo: changed "Instagram" to "BiliBili" for a social media logo.

🎯 Purpose & Impact

• 🔗 Improved Transparency: Using full URLs increases trust and clarity for users.
• 🔍 Accuracy: Correcting the typo ensures accurate representation of Ultralytics’ social media platforms.
• 🎯 User Experience: Enhances the overall accessibility and professionalism of the documentation, making it easier to navigate.