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

Minor updates to URLs and alt text in the documentation for clearer references and improved accuracy.

📊 Key Changes

• Updated URLs from "bit.ly" links to full "ultralytics.com" links for the Ultralytics HUB.
• Corrected the alt text for the BiliBili icon from "Ultralytics Instagram" to "Ultralytics BiliBili."

🎯 Purpose & Impact

• Enhanced Clarity: More descriptive alt text for icons provides better context.
• Improved User Navigation: Full URLs make the destination of hyperlinks clearer, enhancing user experience when accessing the Ultralytics HUB.