Remove assert not is_docker() from GitHub checks

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Improved GitHub checks in non-Docker environments 🛠️.

📊 Key Changes

• Removed the line that skips GitHub status checks if the code is running within a Docker image.

🎯 Purpose & Impact

• Enables the GitHub status check feature within Docker containers, ensuring that users are alerted about updates even when operating in these environments.
• Potentially affects users who rely on the Docker setup for YOLOv5, as they will now receive prompts for updates or changes to the repository, enhancing their awareness of new features or important fixes. 🚀