Update requirements.txt

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Integration of Weights & Biases (wandb) for enhanced training visualization.

📊 Key Changes

• Un-commented the wandb line in requirements.txt to include it as a requirement.
• Updated the utils/loggers/__init__.py script to handle a specific wandb login error.

🎯 Purpose & Impact

• Purpose: This change allows users to take advantage of wandb's powerful visualization and tracking features for model training and debugging by making wandb a default requirement.
• Impact:
  • Positive: Users get an improved experience with more sophisticated training monitoring and debugging tools.
  • Potential Challenges: New users will need to create a wandb account and current users will need to have their wandb environment set up correctly to benefit from these features.
  • Robustness: The error handling for the wandb login process has been improved to cater to non-TTY terminals, minimizing login issues and enhancing user experience.