readme: update build status badge

README.md

@@ -5,7 +5,7 @@
 [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.10069281.svg)](https://doi.org/10.5281/zenodo.10069281)
 
 [![Supported Python versions](https://img.shields.io/pypi/pyversions/qiskit-aqt-provider.svg)](https://pypi.python.org/pypi/qiskit-aqt-provider)
-![Build Status](https://github.com/qiskit-community/qiskit-aqt-provider/actions/workflows/poetry.yml/badge.svg?branch=master)
+![Build Status](https://github.com/qiskit-community/qiskit-aqt-provider/actions/workflows/tests.yml/badge.svg?branch=master)
 [![Coverage Status](https://coveralls.io/repos/github/qiskit-community/qiskit-aqt-provider/badge.svg?branch=master)](https://coveralls.io/github/qiskit-community/qiskit-aqt-provider?branch=master)
 [![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/charliermarsh/ruff/main/assets/badge/v1.json)](https://github.com/charliermarsh/ruff)
 [![Checked with mypy](https://www.mypy-lang.org/static/mypy_badge.svg)](https://mypy-lang.org/)