Edit readme and contributing

CONTRIBUTING.md

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+# Contributing
+
+We use GitHub to host code, to track issues and feature requests, as well as accept pull requests.
+
+## We Use GitHub Flow
+
+All code changes happen through pull requests, so we recommend GitHub's [GitHub Flow](https://guides.github.com/introduction/flow/). Pull requests are the best way to propose changes to the codebase. We actively welcome your pull requests:
+
+1. **Fork the repo and create your branch from `main`.**
+2. **If you've added code that should be tested, add tests.**
+3. **Ensure the test suite passes.**
+4. **Make sure your code lints.**
+5. **Issue that pull request!**
+
+## Any contributions you make will be under the Software License
+
+In short, when you submit code changes, your submissions are understood to be under the same [license](LICENSE) that covers the project. Feel free to contact the maintainers if that's a concern.
+
+## Report bugs using GitHub's issues
+
+We use GitHub issues to track public bugs. Report a bug by [opening a new issue](../../issues/new).
+
+## Write bug reports with detail, background, and sample code
+
+**Great Bug Reports** tend to have:
+
+- A quick summary and/or background
+- Steps to reproduce
+  - Be specific!
+  - Give sample code if you can.
+- What you expected would happen
+- What actually happens
+- Notes (possibly including why you think this might be happening, or stuff you tried that didn't work)
+
+## License
+
+By contributing, you agree that your contributions will be licensed under its [license](LICENSE).

README.md

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 # law-encoder
 
-⚖️👨‍⚖️ `️‍️law-encoder` is a Rust library for A-law and μ-law (mu-law) audio encoding. These encoding schemes are defined in ITU-T standards G.711 and are widely used in digital audio processing, particularly in telephony and audio compression.
+⚖️`️‍️law-encoder`👨‍⚖ is a Rust library for A-law and μ-law (mu-law) audio encoding. These encoding schemes are defined in ITU-T standards G.711 and are widely used in digital audio processing, particularly in telephony and audio compression.
 
 ## Features