Bump actions/setup-python from v5 to v6 in /.github/workflows

[UltralyticsAssistant]

Bump actions/setup-python from v5 to v6 in /.github/workflows

This PR updates GitHub Actions references in this repository.

Examples:

• Branch: actions/checkout@main stays on @main
• Major tag: actions/checkout@v4 updates to @v5
• Specific tag: astral-sh/setup-uv@v0.5.0 updates to @v0.9.4
• SHA pinned: actions/checkout@<sha> # v4.1.0 updates to the latest release SHA and tag comment

_{Made with ❤️ by Ultralytics Actions}

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

🔧 This PR updates the GitHub Actions CI workflow to use actions/setup-python@v6 instead of @v5.

📊 Key Changes

• Updated the CI configuration in .github/workflows/ci.yml
• Replaced actions/setup-python@v5 with actions/setup-python@v6
• Kept the Python version unchanged at 3.11

🎯 Purpose & Impact

• Improves the project’s GitHub Actions workflow by using the latest supported version of the Python setup action 🚀
• Helps keep CI dependencies current, which can improve reliability, security, and long-term maintainability
• Has no direct effect on scraper features or user-facing functionality, but supports smoother automated testing and development ✅