Update default --epochs 100

[glenn-jocher]

@AyushExel @kalenmike updating default Detection and Segmentation trainings to 100 epochs

Signed-off-by: Glenn Jocher [email protected]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Updated YOLOv5 training command examples and default epoch setting.

📊 Key Changes

• 🛠️ Modified the training command examples in both English and Chinese README files to include --epochs 300.
• 🔄 Changed default epochs in train.py and segment/train.py from 300 to 100.

🎯 Purpose & Impact

• 🎓 The example command updates in the README documents are likely aimed at standardizing training duration in the documentation for consistency and clarification.
• 🏃 Reducing the default number of epochs may make the training process faster for users, potentially lowering computational costs and speeding up experimentation. However, it could impact the model performance if not adjusted based on the dataset and use-case requirements.