update docs from 1.9.0 to 1.9.1

[n063h]

Signed-off-by: hang lv xlv20@fudan.edu.cn

Description

1. updated docs from 1.9.0 to 1.9.1
2. changed deprecated api used in tutorial

Tests

Before fix

serving tutorial commandflow job submit -d fateflow/examples/lr/test_hetero_lr_job_dsl.json -c fateflow/examples/lr/test_hetero_lr_job_conf.json would fail, and output ValueError: In Fate-v1.9 or later version, DataIO is deprecated, use DataTransform instead.

After fix

I changed DataIO to DataTransform, then task ran successfully.