Single-line TRT dynamic assertion

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhanced error messaging for model input size mismatches in YOLOv5.

📊 Key Changes

• Simplified the error message when input image shape doesn't match the expected model input shape.
• Adjusted the condition to accommodate dynamic input shapes.

🎯 Purpose & Impact

• 🎨 Easier to understand: The error message is now clearer for users encountering size mismatch issues.
• ✨ Dynamic shape support: The new assert condition properly handles models with dynamic input sizes, improving user experience for a broader range of model configurations.