Fix typo in error message
Fix typo in error message

claytonbrown/dokku,progrium/dokku,claytonbrown/dokku,progrium/dokku,claytonbrown/dokku,dokku/dokku,progrium/dokku,dokku/dokku,dokku/dokku,claytonbrown/dokku,progrium/dokku,progrium/dokku,dokku/dokku,claytonbrown/dokku,progrium/dokku,progrium/dokku,dokku/dokku,dokku/dokku,claytonbrown/dokku,claytonbrown/dokku,progrium/dokku,dokku/dokku,claytonbrown/dokku,dokku/dokku