Update zh_CN.po

[TC999]

Thanks for taking the time to contribute to Git!

Those seeking to contribute to the Git for Windows fork should see
http://gitforwindows.org/#contribute on how to contribute Windows specific
enhancements.

If your contribution is for the core Git functions and documentation
please be aware that the Git community does not use the github.com issues
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[dscho]

Thank you for this contribution! It seems to be a translation PR, though, i.e. touching po/. As per po/README.md, could you please re-open this PR in https://github.com/git-l10n/git-po/?

[TC999]

Thank you for this contribution! It seems to be a translation PR, though, i.e. touching po/. As per po/README.md, could you please re-open this PR in https://github.com/git-l10n/git-po/?

OK git-l10n#804