Merge pull request ceph#60066 from ceph/wip-openssf-main

README: add OpenSSF Best Practices Badge

Author: epuertat

README.md

@@ -4,6 +4,7 @@ See https://ceph.com/ for current information about Ceph.
 
 ## Status
 
+[![OpenSSF Best Practices](https://www.bestpractices.dev/projects/2220/badge)](https://www.bestpractices.dev/projects/2220)
 [![Issue Backporting](https://github.com/ceph/ceph/actions/workflows/create-backport-trackers.yml/badge.svg)](https://github.com/ceph/ceph/actions/workflows/create-backport-trackers.yml)
 
 ## Contributing Code