Update schedule_zh-CN.md

[bjtuchenmin]

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Contribution Checklist

• Name the pull request in the form "[Issue XYZ][component] Title of the pull request", where XYZ should be replaced by the actual issue number.
  Skip Issue XYZ if there is no associated github issue for this pull request.
  Skip component if you are unsure about which is the best component. E.g. [docs] Fix typo in produce method.

• Fill out the template below to describe the changes contributed by the pull request. That will give reviewers the context they need to do the review.

• Each pull request should address only one issue, not mix up code from multiple issues.

• Each commit in the pull request has a meaningful commit message

• Once all items of the checklist are addressed, remove the above text and this checklist, leaving only the filled out template below.

(The sections below can be removed for hotfixes of typos)
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(If this PR fixes a github issue, please add Fixes #<xyz>.)

Fixes #

(or if this PR is one task of a github issue, please add Master Issue: #<xyz> to link to the master issue.)

Master Issue: #

Motivation

Explain here the context, and why you're making that change. What is the problem you're trying to solve.

Modifications

Describe the modifications you've done.

Verify this change

• Make sure that the change is correct.
• For how to check and verify, refer to Translation and localization.

Documentation

• Is this pull request related to crowdin usage? (yes / no)
• Is this pull request related to translation quality? (yes / no)
• If yes, how to improve?
• Is this pull request related to translation guidelines?(yes / no)
• Is this pull request related to translation workflow?(yes / no)
• If a sth is not documented yet in this PR, please create a followup issue for adding the documentation.

[bjtuchenmin]

I've finished translation, could you please help review?

[tuhaihe]

@bjtuchenmin thanks for your translations. Review work has been done.
@jennifer88huang could you help review this PR? thanks.