[MariaDB] Update to 10.5

docker-compose.yml

@@ -17,7 +17,7 @@ services:
             - unbound
 
     mysql-mailcow:
-      image: mariadb:10.4
+      image: mariadb:10.5
       depends_on:
         - unbound-mailcow
       stop_grace_period: 45s