fix(module:i18n): update zh_TW.ts

[MurabitoB]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[x] Other... Please describe: Update zh_TW downloadFile translation

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[zorro-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #7901 (4265456) into master (538ef21) will not change coverage.
The diff coverage is n/a.

❗ Current head 4265456 differs from pull request most recent head 5cd53aa. Consider uploading reports for the commit 5cd53aa to get more accurate results

@@           Coverage Diff           @@
##           master    #7901   +/-   ##
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  Coverage   91.78%   91.78%           
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  Files         509      509           
  Lines       17444    17444           
  Branches     2772     2772           
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  Hits        16011    16011           
  Misses       1134     1134           
  Partials      299      299           

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