adding security notice

Author: aar0np

README.md

@@ -4,7 +4,7 @@ This repository was temporarily offline following the confirmation of unauthoriz
 
 We followed established incident-response processes to review and to revert any unauthorized activity.
 
-Required Actions: Collaborators who interacted with this repository between January 31, 2026, and February 9, 2026, rebase your branch onto the new main / master. *Do not merge main / master into your branch!*
+Required Actions: Collaborators who interacted with this repository between January 31, 2026, and February 9, 2026, rebase your branch onto the new main / master. **Do not merge main / master into your branch!**
 
 At DataStax, we remain committed to your security and to transparency within the open-source community.