Update ci.yml with uv

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Streamlined the CI workflow with updated tools for Python setup and dependency management.

📊 Key Changes

• 🔄 Replaced actions/setup-python usage to simplify setup commands.
• ➕ Introduced astral-sh/setup-uv@v4 for dependency management.
• ✏️ Updated dependency installation command to use uv pip for improved compatibility and efficiency.

🎯 Purpose & Impact

• ⚡ Faster setup and installs: Leveraging setup-uv simplifies workflows and can reduce setup time.
• 🛠️ Improved tooling: Embraces modern tooling tailored for streamlined Python package management.
• 🙌 Enhanced compatibility: Aligns with best practices, offering more robust CI/CD performance for developers.

[UltralyticsAssistant]

👋 Hello @glenn-jocher, thank you for submitting an ultralytics/template 🚀 PR! To ensure a seamless integration of your work, please review the following checklist:

• ✅ Define a Purpose: Clearly explain the purpose of your fix or feature in your PR description, and link to any relevant issues. Ensure your commit messages are clear, concise, and adhere to the project's conventions.
• ✅ Synchronize with Source: Confirm your PR is synchronized with the ultralytics/template main branch. If it's behind, update it by clicking the 'Update branch' button or by running git pull and git merge main locally.
• ✅ Ensure CI Checks Pass: Verify all Ultralytics Continuous Integration checks are passing. If any checks fail, please address the issues.
• ✅ Update Documentation: Update the relevant documentation for any new or modified features.
• ✅ Add Tests: If applicable, include or update tests to cover your changes, and confirm that all tests are passing.
• ✅ Sign the CLA: Please ensure you have signed our Contributor License Agreement if this is your first Ultralytics PR by writing "I have read the CLA Document and I sign the CLA" in a new message.
• ✅ Minimize Changes: Limit your changes to the minimum necessary for your bug fix or feature addition. "It is not daily increase but daily decrease, hack away the unessential. The closer to the source, the less wastage there is." — Bruce Lee

Thank you for contributing to Ultralytics! 🚀 This is an automated response, but an Ultralytics engineer will review your PR and provide further assistance soon. Let us know in the comments if you have any questions! 😊

[UltralyticsAssistant]

🎉 Woohoo, your PR has been merged, @glenn-jocher! 🚀

Thank you for your incredible work in streamlining our CI workflows with smarter tools and improved efficiencies. This is a leap forward for robust development processes! Your efforts shine brightly in making things not just work, but work better. ⚡

As Leonardo da Vinci said: “Simplicity is the ultimate sophistication.” Your thoughtful contributions remind us that innovation lies in making complex things seamless and elegant. 🙌

Here’s to faster setups, smarter installs, and a stronger community—one merge at a time. 🌟