fix yamllint

meta/main.yml

+---
 galaxy_info:
   author: Rémi
   description: Role to configure backup server to allow SFTP connection from all other servers
   company: Le Filament (https://le-filament.com)
-  
   license: AGPL-3.0-or-later
-
   min_ansible_version: 2.1
-
   platforms:
     - name: CentOS
       versions:
@@ -15,7 +13,6 @@ galaxy_info:
       versions:
         - 18.04
         - 20.04
-
   galaxy_tags:
     - backup
     - sftp