Update publish-handbook.yml

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Streamline the workflow for publishing the Ultralytics Handbook by rearranging steps for efficiency and avoiding force deployment.

📊 Key Changes

• 🗂️ Moved the "Checkout repository" step to the beginning of the workflow.
• 📦 Removed the --force option from the mkdocs gh-deploy command.
• 📥 Added a git fetch origin gh-pages step before deployment.

🎯 Purpose & Impact

• ⚡ Improves workflow efficiency by ensuring the repository is checked out first, preparing everything needed.
• 🔄 Enhances build reliability and safety by fetching the latest gh-pages branch before deployment, preventing unnecessary force pushes.
• 🌐 Encourages smoother updates and consistency on GitHub Pages for handbook access.