Update README.md

Author: BertrandGouny

README.md

@@ -166,8 +166,7 @@ Required and used for new ldap server only :
 - **LDAP_DOMAIN**: Ldap domain. Defaults to `example.org`
 - **LDAP_ADMIN_PASSWORD** Ldap Admin password. Defaults to `admin`
 - **LDAP_CONFIG_PASSWORD** Ldap Config password. Defaults to `config`
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-
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 - **LDAP_READONLY_USER** Add a read only user. Defaults to `false`
 - **LDAP_READONLY_USER_USERNAME** Read only user username. Defaults to `readonly`
 - **LDAP_READONLY_USER_PASSWORD** Read only user password. Defaults to `readonly`