Update action.yml to cache pip dependencies

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhancements to Python setup and dependency management in the GitHub Action workflow.

📊 Key Changes

• Added a step to set up Python using actions/setup-python@v5.
  • Configured to use Python version "3.x".
  • Enabled pip dependency caching.
• Adjusted dependency installation command to improve clarity and remove the no-cache option.
• Modified the execution method of a Python script to fetch and run it directly using curl.

🎯 Purpose & Impact

• Improved Efficiency: Caching pip dependencies speeds up the installation process in future runs. ⚡️
• Clarity and Maintenance: Simplifying the dependency installation command and script execution makes the workflow easier to read and maintain. 🛠️
• Enhanced Setup: Ensuring the correct Python environment is set up helps prevent compatibility issues. 🐍