Update git banners

[RizwanMunawar]

@glenn-jocher

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Updated README banners and streamlined documentation for the Ultralytics YOLOv5 repository.

📊 Key Changes

• Updated the main banner image link in README.md and README.zh-CN.md to a new banner celebrating the first anniversary of YOLOv8.
• Cleaned up and simplified phrasing in the utils/flask_rest_api/README.md for better readability.
• Refined documentation and numbering format in utils/loggers/clearml/README.md for clarity.
• Consolidated information and removed unnecessary line breaks in utils/loggers/comet/README.md to improve conciseness.

🎯 Purpose & Impact

• These changes refresh the project's presentation with an updated banner, which may increase engagement and provide a current perspective on the progress of YOLOv8. 🎉
• Improved documentation readability ensures that developers and users can more easily understand and use YOLOv5's REST API and logger utilities. 📖
• Streamlined integration guides for ClearML and Comet loggers may enhance user experience and encourage the adoption of these tools for experiment management and hyperparameter optimization. 🛠️

[github-actions]

👋 Hello @RizwanMunawar, thank you for submitting a YOLOv5 🚀 PR! To allow your work to be integrated as seamlessly as possible, we advise you to:

• ✅ Verify your PR is up-to-date with ultralytics/yolov5 master branch. If your PR is behind you can update your code by clicking the 'Update branch' button or by running git pull and git merge master locally.
• ✅ Verify all YOLOv5 Continuous Integration (CI) checks are passing.
• ✅ Reduce changes to the absolute minimum required for your bug fix or feature addition. "It is not daily increase but daily decrease, hack away the unessential. The closer to the source, the less wastage there is." — Bruce Lee