Bump actions/setup-python from v6 to v7 in /.github/workflows

[UltralyticsAssistant]

Bump actions/setup-python from v6 to v7 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

Updates GitHub Actions workflows to use the latest actions/setup-python@v7 release. ⚙️

📊 Key Changes

• Replaced actions/setup-python@v6 with actions/setup-python@v7 in:
  • Continuous integration workflow (ci.yml)
  • Push workflow (push.yml)
• No changes to application code, model behavior, or deployment configuration.

🎯 Purpose & Impact

• Keeps the repository’s automation workflows up to date. 🔄
• Improves compatibility with current GitHub Actions infrastructure and Python tooling.
• Helps maintain reliable CI checks and push-based automation with minimal maintenance impact. ✅