Fix typo in make:docker:database driver for postgres

[delyro]

See line:

maker-bundle/src/Docker/DockerDatabaseServices.php

Line 92 in 40b49ab

$driver = 'pdsql';

Driver name for postgres is "pdo_pgsql" not "pdo_pdsql". Because of this, selecting postgres throws error:

[jrushlow]

thanks @delyro for the heads up! We have a fix ready to go on this and should be merged soon.