Add CI for jupyter notebook example `workflow_by_code.ipynb`

[you-n-g]

🌟 Feature Description

CI that it can't detect the errors in the report. So I think it would be better to add such a check in our CI. (It may be some command like jupyter nbconvert workflow_by_code.ipynb)

Please refer to this comment. https://github.com/microsoft/qlib/pull/1267#issuecomment-1230072848

Motivation

1. Application scenario
2. Related works (Papers, Github repos etc.):
3. Any other relevant and important information:

Alternatives

Additional Notes

[mohitsaxenaknoldus]

Hey, can I work on this?

[MariaMozgunova]

Hi @you-n-g

Can I take this issue?

[Fivele-Li]

Sorry for the late reply @mohitsaxenaknoldus. I think you can collaborate with @MariaMozgunova to complete this feature. As far as I know, there are several places in the .ipynb files that need to be manually fixed to pass CI.