[ambience] Ajoute message de chargement du mod dans le journal "action"

ambience/init.lua

@@ -688,3 +688,5 @@ minetest.register_chatcommand(
 			minetest.chat_send_player(name, "Music volume set.")
 		end,
 	})	
+
+minetest.log("action", "[ambience] loaded.")