Update P5 + P6 model ensembling

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhancements to model ensemble creation for improved compatibility and performance.

📊 Key Changes

• Updated print statement for ensemble creation to use f-string formatting.
• Removed 'stride' from the list that copies attributes to the ensemble model.
• Added a new line that determines the maximum 'stride' value from all models in the ensemble and assigns it to the ensemble.

🎯 Purpose & Impact

• The change to f-string formatting improves code readability and maintainability. 📖
• Removing 'stride' from the direct attribute copy and computing the maximum 'stride' across all models ensures the ensemble operates with the largest 'stride', potentially improving the performance and compatibility of mixed-model ensembles. 🏃‍♂️💨
• Users might see better ensemble model performance when combining models with different 'stride' values, reflecting a more robust and accurate object detection. 🎯🚀