Fix missing codecov status icon (#209)

Author: FanwangM

README.md

@@ -4,7 +4,7 @@
 [![GPLv3 License](https://img.shields.io/badge/License-GPL%20v3-yellow.svg)](https://opensource.org/licenses/)
 [![CI Tox](https://github.com/theochem/procrustes/actions/workflows/ci_tox.yml/badge.svg?branch=main)](https://github.com/theochem/procrustes/actions/workflows/ci_tox.yml)
 [![docs](https://github.com/theochem/procrustes/actions/workflows/deploy_website.yaml/badge.svg?branch=main)](https://github.com/theochem/procrustes/actions/workflows/deploy_website.yaml)
-[![codecov](https://codecov.io/gh/theochem/procrustes/branch/main/graph/badge.svg?token=3L96J5QQOT)](https://codecov.io/gh/theochem/procrustes)
+[![CI CodeCov](https://github.com/theochem/procrustes/actions/workflows/ci_codecov.yml/badge.svg?branch=main)](https://github.com/theochem/procrustes/actions/workflows/ci_codecov.yml)
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/theochem/procrustes/main?filepath=doc%2Fnotebooks%2F)
 
 The Procrustes library provides a set of functions for transforming a matrix to make it