fix sail mysql command

[nozo-moto]

currently error happen when using sail mysql

$ sail mysql
ERROR: No such service: mysql

So I fixed it. Then you can check it works

$  sail mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 5.7.33 MySQL Community Server (GPL)

Copyright (c) 2000, 2021, Oracle and/or its affiliates.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>

[taylorotwell]

Working fine for me:

[sa9sha9]

@taylorotwell
i faces same issue.
This is a bug that occurs when the service name, in docker-compose.yml, is custom like hoge-mysql.test.
And such a case is highly probable when developing in parallel, since the service name mysql.test is probably duplicated.