updated markdown

README.md

@@ -84,7 +84,7 @@ Other use cases include [your terminal](https://github.com/hitblast/avro.py-cli)
 
 In short, avro.py doesn't depend on any third-party libraries. However, if you'd like to contribute to the project, you'll need a handful of such useful tools. <br>
 
-- [flake8](https://flake8.pycqa.org/en/latest/) - linter
+- [ruff](https://github.com/astral-sh/ruff) - linter
 - [pytest](https://pypi.python.org/pypi/pytest) - testing framework
 - [black](https://github.com/psf/black) - formatting