Add pip install --retries 3 to CI to resolve transients

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhanced reliability of dependency installations in CI workflow 🛠️💫

📊 Key Changes

• Added --retries 3 to pip install commands in CI workflow to attempt installation up to 3 times in case of failure.

🎯 Purpose & Impact

• Improves CI stability: By retrying failed installations, this change aims to reduce the chances of CI failures due to transient network issues or temporary PyPI outages. 🌐✨
• Enhances developer experience: Developers will face fewer interruptions caused by flaky CI runs, leading to a smoother development and testing process. 🚀
• Potential Impact to Users: While this change primarily affects the development process, users indirectly benefit from a more reliable and efficient pipeline that accelerates bug fixes, feature additions, and overall software stability. 🌈🛠️