YOLOv5 OpenVINO PyTorch Hub inference fix

[glenn-jocher]

Resolves bug report #7817

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Improved model checkpoint path resolution in hubconf.py.

📊 Key Changes

• Modified the checkpoint path assignment logic to handle directories properly.

🎯 Purpose & Impact

• 🎯 Purpose: Ensure that when specifying a model name, the code does not mistakenly add a .pt suffix to a directory, preventing potential loading errors.
• 💥 Impact: This improvement will lead to more robust model loading, especially when using custom directories or unconventional naming schemes. Users will experience fewer errors and more predictable behavior when loading models.