Fix badges

Black and isort were replaced by Ruff

Author: LKajan

README.md

@@ -4,8 +4,7 @@
 [![Downloads](https://img.shields.io/pypi/dm/pytest-qgis.svg)](https://pypistats.org/packages/pytest-qgis)
 ![CI](https://github.com/GispoCoding/pytest-qgis/workflows/CI/badge.svg)
 [![Code on Github](https://img.shields.io/badge/Code-GitHub-brightgreen)](https://github.com/GispoCoding/pytest-qgis)
-[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
-[![Imports: isort](https://img.shields.io/badge/%20imports-isort-%231674b1?style=flat&labelColor=ef8336)](https://pycqa.github.io/isort/)
+[![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
 [![pre-commit](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white)](https://github.com/pre-commit/pre-commit)
 [![codecov.io](https://codecov.io/github/GispoCoding/pytest-qgis/coverage.svg?branch=main)](https://codecov.io/github/GispoCoding/pytest-qgis?branch=main)