Update howfairis badge.

Author: raar1

README.md

@@ -1,7 +1,7 @@
 ![Build Status](https://github.com/fair-workflows/fairworkflows/workflows/Python%20application/badge.svg)
 [![Coverage Status](https://coveralls.io/repos/github/fair-workflows/fairworkflows/badge.svg?branch=main)](https://coveralls.io/github/fair-workflows/fairworkflows?branch=main)
 [![PyPI version](https://badge.fury.io/py/fairworkflows.svg)](https://badge.fury.io/py/fairworkflows)
-[![fair-software.eu](https://img.shields.io/badge/fair--software.eu-%E2%97%8F%20%20%E2%97%8F%20%20%E2%97%8F%20%20%E2%97%8F%20%20%E2%97%8B-yellow)](https://fair-software.eu)
+[![fair-software.eu](https://img.shields.io/badge/fair--software.eu-%E2%97%8F%20%20%E2%97%8F%20%20%E2%97%8F%20%20%E2%97%8F%20%20%E2%97%8F-green)](https://fair-software.eu)
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/fair-workflows/fairworkflows/main?filepath=examples%2Ffairworkflows-quick-start.ipynb)
 [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/4804/badge)](https://bestpractices.coreinfrastructure.org/projects/4804)