Add openssf scorecard to README (#907)

Author: inimaz

README.md

@@ -11,6 +11,7 @@ Estimate and track carbon emissions from your computer, quantify and analyze the
 [![](https://img.shields.io/pypi/v/codecarbon?color=024758)](https://pypi.org/project/codecarbon/)
 [![DOI](https://zenodo.org/badge/263364731.svg)](https://zenodo.org/badge/latestdoi/263364731)
 [![Downloads](https://static.pepy.tech/badge/codecarbon/month)](https://pepy.tech/project/codecarbon)
+[![OpenSSF Scorecard](https://api.scorecard.dev/projects/github.com/mlco2/codecarbon/badge)](https://scorecard.dev/viewer/?uri=github.com/mlco2/codecarbon)
 
 
 - [About CodeCarbon 💡](#about-codecarbon-)