fix: update ruby version
fix: update ruby version

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