docs(readme): code style: ruff

Author: bsrdjan

README.md

@@ -5,7 +5,7 @@ Asynchronous, non-blocking [SAP NetWeawer RFC SDK](https://support.sap.com/en/pr
 [![PyPI - Wheel](https://img.shields.io/pypi/wheel/pyrfc)](https://pypi.org/project/pyrfc/)
 [![PyPI - Version](https://img.shields.io/pypi/v/pyrfc)](https://pypi.org/project/pyrfc/)
 [![PyPI - Python Version](https://img.shields.io/pypi/pyversions/pyrfc)](https://pypi.org/project/pyrfc/)
-[![Code style](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
+[![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/charliermarsh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
 [![PyPI - Downloads](https://img.shields.io/pypi/dm/pyrfc)](https://pypistats.org/packages/pyrfc)
 [![REUSE status](https://api.reuse.software/badge/github.com/SAP/PyRFC)](https://api.reuse.software/info/github.com/SAP/PyRFC)
 [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/4349/badge)](https://bestpractices.coreinfrastructure.org/projects/4349)