Fix OpenVINO Usage example

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Ultralytics YOLOv5 updates model naming convention for OpenVINO format.

📊 Key Changes

• Renamed model files from yolov5s-cls.xml to yolov5s-cls_openvino_model for clarity in classifier prediction, validation, and export scripts.
• Updated model file name from yolov5s.xml to yolov5s_openvino_model in detection and validation scripts.
• Made a typo correction in models/common.py from _openvino_model to _paddle_model for PaddlePaddle models.
• Adjusted seg-val script syntax for consistency (though it seemed to be a reverted change).

🎯 Purpose & Impact

• 🧐 Enhances clarity of model file naming for better user understanding.
• 🚀 Facilitates smoother model identification and manipulation for workflows integrating OpenVINO.
• 🛠 Fixes a typo, ensuring accurate references for PaddlePaddle models and preventing user confusion.
• 💼 Minor script correction contributes to codebase neatness, though with no direct user impact.