Update license line in Python files

[UltralyticsAssistant]

This pull request updates or adds the license line to the beginning of each Python file.

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Minor updates to license information across multiple files.

📊 Key Changes

• Adjusted license text in .github/dependabot.yml and .github/workflows/format.yml.
• Added license information to action.yml, utils/run_pr_summary.py, and utils/update_markdown_code_blocks.py.

🎯 Purpose & Impact

• Clarification: Ensures consistent and clear license information in project files.
• Transparency: Provides direct links to the licensing terms, promoting better understanding and compliance.
• Minimal Impact: These changes are informational and have no functional effect on the code or its execution.

🚀🔗