Standardize license headers in Python files (#37)

Automated merge of Ultralytics Code Refactor

Author: pderrenger

docs/contributions/how-to-contribute.md

@@ -48,7 +48,7 @@ Our open-source projects are maintained by a dedicated team of developers. Feel
 
 ## Contribution Guidelines
 
-For detailed contribution guidelines, please visit our [official documentation](https://docs.ultralytics.com/help/contribute). Here's a quick overview of the process:
+For detailed contribution guidelines, please visit our [official documentation](https://docs.ultralytics.com/help/contribute/). Here's a quick overview of the process:
 
 1. Fork the repository you want to contribute to
 2. Create a new branch for your feature or fix
@@ -75,6 +75,6 @@ If you have questions about contributing, you can:
 - Open an issue on GitHub
 - Join our community discussions
 - Reach out to team members listed above
-- Check our [documentation](https://docs.ultralytics.com) for guides and tutorials
+- Check our [documentation](https://docs.ultralytics.com/) for guides and tutorials
 
 Thank you for your interest in contributing to Ultralytics! Together, we're building the future of AI technology.