Added silent join to french translation file

Author: OllieMartin

multichat/src/main/resources/config_fr.yml

@@ -275,6 +275,7 @@ privacy_settings:
 premium_vanish:
     prevent_message: true # Bloquer l'utilisation de la commande /msg
     prevent_staff_list: true # Masquer de la liste /staff
+    silence_join: true # Prevent vanished players sending a join message
 
 # Legacy (PRE-1.16) Servers
 # Listing servers here will mark them as 'LEGACY' servers