Update YOLOv5 v7.0 Banner Assets

[pderrenger]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Visual refresh of YOLOv5 splash screens in the v7.0 release.

📊 Key Changes

• Updated splash.png, the primary splash image associated with YOLOv5 v7.0.
• Modified splashv.png, which is likely a variant of the splash image for different contexts or display modes.

🎯 Purpose & Impact

• The purpose of the changes is to provide a new visual identity or branding as part of the version update, which can improve user experience and modernize the project's appearance.
• Potential impact includes a refreshed look for YOLOv5 users and contributors, contributing to a better first impression for those updated to v7.0. It may also be used for marketing or promotional purposes to showcase the new features or improvements of the YOLOv5 v7.0 release.

[glenn-jocher]

@pderrenger looks good! :)