Add JOSS Badge

Author: MarJMue

README.md

@@ -4,7 +4,7 @@
 
 --------
 
-![PyPI - Python Version](https://img.shields.io/pypi/pyversions/pyElli) [![PyPI](https://img.shields.io/pypi/v/pyElli)](https://pypi.org/project/pyElli/) [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.5702469.svg)](https://doi.org/10.5281/zenodo.5702469) [![Pytest](https://github.com/PyEllips/pyElli/actions/workflows/pytest.yml/badge.svg)](https://github.com/PyEllips/pyElli/actions/workflows/pytest.yml) [![Documentation Status](https://readthedocs.org/projects/pyelli/badge/?version=latest)](https://pyelli.readthedocs.io/en/latest/?badge=latest) [![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)
+![PyPI - Python Version](https://img.shields.io/pypi/pyversions/pyElli) [![PyPI](https://img.shields.io/pypi/v/pyElli)](https://pypi.org/project/pyElli/) [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.5702469.svg)](https://doi.org/10.5281/zenodo.5702469) [![status](https://joss.theoj.org/papers/515ecaee405aa0be1cb9b887fc5e21bb/status.svg)](https://joss.theoj.org/papers/515ecaee405aa0be1cb9b887fc5e21bb) [![Pytest](https://github.com/PyEllips/pyElli/actions/workflows/pytest.yml/badge.svg)](https://github.com/PyEllips/pyElli/actions/workflows/pytest.yml) [![Documentation Status](https://readthedocs.org/projects/pyelli/badge/?version=latest)](https://pyelli.readthedocs.io/en/latest/?badge=latest) [![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)
 
 [![](https://dcbadge.vercel.app/api/server/zCBNMtBFAQ?compact=true)](https://discord.gg/zCBNMtBFAQ)