Update https://ultralytics.com/images/zidane.jpg

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Updated the sample image URL in the README.

📊 Key Changes

• Changed the source URL of the sample image used in the YOLOv5 README.

🎯 Purpose & Impact

• Purpose: The change aims to fix or update the sample image link. This may be to reflect a new hosting location or to ensure the link points to an updated or higher-quality image.
• Impact: Users following the README instructions will now fetch the sample image from the updated URL, ensuring compatibility with the provided code sample. No significant impact on model functionality or usage is expected.