fix typo

docker-compose.yml

@@ -25,7 +25,7 @@ services:
       - ./data:/shared # Required, specifies the path to Seafile data persistent store.
     environment:
       - DB_HOST=db
-      - DB_ROOT_PASSWD=${MYSQL_ROOT_PASSWD} # Required, the value should be root's password of MySQL service.
+      - DB_ROOT_PASSWD=${MYSQL_ROOT_PASSWORD} # Required, the value should be root's password of MySQL service.
       - TIME_ZONE=Europe/Paris
       - SEAFILE_ADMIN_EMAIL=${SEAFILE_ADMIN_EMAIL} # Specifies Seafile admin user, default is 'me@example.com'.
       - SEAFILE_ADMIN_PASSWORD=${SEAFILE_ADMIN_PASSWORD} # Specifies Seafile admin password, default is 'asecret'.