zh-CN: update the translation

[tianyeeT]

Summary

catch up with en version to 100%

Related Issue

#2122

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[mgeisler]

@wnghl, @anlunx, @kongy, etc... would you be able to take a look at this?

[mgeisler]

Hi @tianyeeT, thanks a lot for this! Could you rebase the PR on top of the latest main commit so that the CI checks can get a change to run again? Thanks!

[mgeisler]

Hi @tianyeeT, you might want to take a look at the steps here for merging the .po file: #1948 (comment).

The recipe basically treats each file as a large (msgid, msgstr) map and takes the union of the two files.