Update action.yml for Prettier on YAMLs

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Improved code formatting action with Prettier exclusions.

📊 Key Changes

• Switched from a broad prettier format command to a more targeted find-exec command.
• Excluded files in the ./docs/ and ./.github/workflows/ directories from Prettier formatting.

🎯 Purpose & Impact

• 🛠 The change aims to prevent unintentional formatting of documentation and workflow files, focusing on code consistency while respecting areas where formatting may be project-specific or unnecessary.
• 🚀 Users can expect reduced risk of formatting conflicts in sensitive directories and better control over which files get formatted by Prettier. This can be especially beneficial for projects with custom documentation and CI/CD pipeline setups.