Add tests for notebooks

[RizwanMunawar]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Added automated testing for a YOLO notebook to ensure reliability and smooth updates. 🚀📓

📊 Key Changes

• Introduced a GitHub Actions workflow to automatically run and test a specific YOLO notebook.
• Workflow triggers on pushes, pull requests to main, and daily at 08:00 UTC.
• Sets up a Python 3.11 environment and installs necessary Jupyter tools.
• Executes the "how-to-train-ultralytics-yolo-on-medical-pills-dataset" notebook as a test.

🎯 Purpose & Impact

• Ensures the notebook runs correctly with every code change or update, catching errors early. 🛡️
• Improves reliability and user confidence in the provided notebook examples.
• Streamlines development by automating testing, saving time for contributors and maintainers. ⏱️

[UltralyticsAssistant]

👋 Hello @RizwanMunawar, thank you for submitting a PR to ultralytics/notebooks 🚀! This is an automated response to help guide your contribution—an Ultralytics engineer will review and assist you soon.

Please take a moment to review the following checklist to help ensure a smooth review process:

• ✅ Define a Purpose: Clearly state the purpose of your PR in the description, and link any relevant issues. Ensure your commit messages are clear and follow project conventions.
• ✅ Synchronize with Source: Make sure your PR is up to date with the main branch of ultralytics/notebooks. If not, use the 'Update branch' button or git pull and git merge main locally.
• ✅ Ensure CI Checks Pass: Confirm that all Ultralytics Continuous Integration (CI) checks are passing. Please resolve any CI failures.
• ✅ Update Documentation: Update the relevant documentation if your PR adds or modifies features.
• ✅ Add Tests: If applicable, ensure tests are included or updated for your changes, and all tests are passing.
• ✅ Sign the CLA: If this is your first PR to Ultralytics, please sign our Contributor License Agreement (CLA) by commenting "I have read the CLA Document and I sign the CLA".
• ✅ Minimize Changes: Limit your changes to the minimum necessary for your fix or feature. "It is not daily increase but daily decrease, hack away the unessential. The closer to the source, the less wastage there is." — Bruce Lee

For further details, see our Contributing Guide. If you have questions, feel free to leave a comment. Thank you for helping improve Ultralytics! 🚀✨