Update README.md with OpenSSF badge (#4569)

Signed-off-by: Karthik Satchitanand <karthik.s@harness.io>

README.md

@@ -9,7 +9,7 @@
 [![GitHub stars](https://img.shields.io/github/stars/litmuschaos/litmus?style=social)](https://github.com/litmuschaos/litmus/stargazers)
 [![GitHub issues](https://img.shields.io/github/issues/litmuschaos/litmus)](https://github.com/litmuschaos/litmus/issues)
 [![Twitter Follow](https://img.shields.io/twitter/follow/litmuschaos?style=social)](https://twitter.com/LitmusChaos)
-[![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/3202/badge)](https://bestpractices.coreinfrastructure.org/projects/3202)
+[![OpenSSF Best Practices](https://www.bestpractices.dev/projects/3202/badge)](https://www.bestpractices.dev/projects/3202)
 [![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Flitmuschaos%2Flitmus.svg?type=shield)](https://app.fossa.io/projects/git%2Bgithub.com%2Flitmuschaos%2Flitmus?ref=badge_shield)
 [![YouTube Channel](https://img.shields.io/badge/YouTube-Subscribe-red)](https://www.youtube.com/channel/UCa57PMqmz_j0wnteRa9nCaw)
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