Update doc

SECURITY.md

@@ -12,7 +12,8 @@ This file contains some policies about the security reports on Dolibarr ERP CRM
 
 ## Reporting a Vulnerability
 
-To report a vulnerability, please use GitHub security advisory at [https://github.com/Dolibarr/dolibarr/security/advisories/new](https://github.com/Dolibarr/dolibarr/security/advisories/new) (if you have permissions) or alternatively send an email to security@dolibarr.org (for everybody)
+To report a vulnerability, for a private report, please use GitHub security advisory at [https://github.com/Dolibarr/dolibarr/security/advisories/new](https://github.com/Dolibarr/dolibarr/security/advisories/new) (if you have permissions).
+Alternatively send an email to security@dolibarr.org (for everybody)
 
 ## Hunting vulnerabilities on Dolibarr