Fix PyPI downloads links

[pderrenger]

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. 🌟

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🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Minor updates to README links for accuracy and user convenience.

📊 Key Changes

• Updated the download badge link in both English and Chinese README files to point to the correct URL on the PePy website.

🎯 Purpose & Impact

• 📈 Improved Clarity: Ensures users are directed to the correct page for download statistics, enhancing user navigation and experience.
• 🔗 Link Accuracy: Fixes a minor error in documentation, maintaining the project's professionalism and resource accessibility.

[UltralyticsAssistant]

👋 Hello @pderrenger, thank you for submitting a PR to ultralytics/yolov3! 🚀 This is an automated response to help streamline the process, and an Ultralytics engineer will also assist you soon.

Here's a checklist to ensure your pull request is ready for review:

• ✅ Define a Purpose: Clearly describe the goal of your changes in the PR description. If applicable, link any relevant open issues to offer context.
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Thank you again for your contribution! We appreciate your efforts to enhance the Ultralytics YOLOv3 project. 🎉