🩹 fix CD badge

README.md

@@ -2,7 +2,7 @@
 ![OS](https://img.shields.io/badge/os-linux%20%7C%20macos%20%7C%20windows-blue?style=flat-square)
 [![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg?style=flat-square)](https://opensource.org/licenses/MIT)
 [![CI](https://img.shields.io/github/actions/workflow/status/cda-tum/mqt-qcec/ci.yml?branch=main&style=flat-square&logo=github&label=ci)](https://github.com/cda-tum/mqt-qcec/actions/workflows/ci.yml)
-[![CD](https://img.shields.io/github/actions/workflow/status/cda-tum/mqt-qcec/cd.yml?branch=main&style=flat-square&logo=github&label=cd)](https://github.com/cda-tum/mqt-qcec/actions/workflows/cd.yml)
+[![CD](https://img.shields.io/github/actions/workflow/status/cda-tum/mqt-qcec/cd.yml?style=flat-square&logo=github&label=cd)](https://github.com/cda-tum/mqt-qcec/actions/workflows/cd.yml)
 [![Documentation](https://img.shields.io/readthedocs/qcec?logo=readthedocs&style=flat-square)](https://mqt.readthedocs.io/projects/qcec)
 [![codecov](https://img.shields.io/codecov/c/github/cda-tum/mqt-qcec?style=flat-square&logo=codecov)](https://codecov.io/gh/cda-tum/mqt-qcec)