[core] Keep OpenSSF badge up-to-date

Author: oliviertassinari

README.md

@@ -17,7 +17,7 @@
 [![Renovate status](https://img.shields.io/badge/renovate-enabled-brightgreen.svg)](https://github.com/mui/material-ui/issues/27062)
 [![Average time to resolve an issue](https://isitmaintained.com/badge/resolution/mui/material-ui.svg)](https://isitmaintained.com/project/mui/material-ui 'Average time to resolve an issue')
 [![Open Collective backers and sponsors](https://img.shields.io/opencollective/all/mui-org)](https://opencollective.com/mui-org)
-[![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/1320/badge)](https://bestpractices.coreinfrastructure.org/projects/1320)
+[![OpenSSF Best Practices](https://www.bestpractices.dev/projects/1320/badge)](https://www.bestpractices.dev/projects/1320)
 
 </div>