Update README.md

Author: ericof

README.md

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 # PythonBrasil 2025 🚀
 
 [![Built with Cookieplone](https://img.shields.io/badge/built%20with-Cookieplone-0083be.svg?logo=cookiecutter)](https://github.com/plone/cookieplone-templates/)
-[![Black code style](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
-[![Backend Tests](https://github.com/pythonbrasil/pybr25-site/actions/workflows/backend.yml/badge.svg)](https://github.com/pythonbrasil/pybr25-site/actions/workflows/backend.yml)
-[![Frontend Tests](https://github.com/pythonbrasil/pybr25-site/actions/workflows/frontend.yml/badge.svg)](https://github.com/pythonbrasil/pybr25-site/actions/workflows/frontend.yml)
+[![CI](https://github.com/pythonbrasil/pybr2025-site/actions/workflows/main.yml/badge.svg)](https://github.com/pythonbrasil/pybr2025-site/actions/workflows/main.yml)
 
 Encontro da comunidade Python Brasileira