update ssh_hardening readme

Author: dev-sec CI

roles/ssh_hardening/README.md

@@ -46,7 +46,6 @@ For more information, see [this issue](https://github.com/dev-sec/ansible-collec
 <!-- BEGIN_ANSIBLE_DOCS -->
 
 ## Supported Operating Systems
-
 - EL
   - 8, 9
 - Ubuntu