Apply suggestions from code review

Co-authored-by: Nathan Bower <[email protected]>
Signed-off-by: Naarcha-AWS <[email protected]>

_security/configuration/tls.md

@@ -135,7 +135,7 @@ plugins.security.authcz.admin_dn:
   - CN=admin,OU=SSL,O=Test,L=Test,C=DE
 ```
 
-For security reasons, you cannot use wildcards or regular expressions as values for the `admin_dn` setting:
+For security reasons, you cannot use wildcards or regular expressions as values for the `admin_dn` setting.
 
 For more information about admin and super admin user roles, see [Admin and super admin roles](https://opensearch.org/docs/latest/security/access-control/users-roles/#admin-and-super-admin-roles) and [Configuring super admin certificates](https://opensearch.org/docs/latest/security/configuration/tls/#configuring-admin-certificates).