Update Traditional Chinese (Taiwan) translation

[toto6038]

Description

Improvement of zh-TW translation quality. One of the problems is the original translation inappropriately used words of Simplified Chinese (China) terminology rather than of Traditional Chinese (Taiwan).
Changes of term are made by referencing Microsoft Language Portal and Mozilla Firefox, which I regard as reliable, authoritative sources.

Specific Changes proposed

Fixed weird translation of strings related to "seek to live" and 'font', and weird usage of terms 'video' and 'audio'. Some refinement is made to improve existing translation as well.

Requirements Checklist

• Feature implemented / Bug fixed
• If necessary, more likely in a feature request than a bug fix
  • Change has been verified in an actual browser (Chrome, Firefox, IE)
  • Unit Tests updated or fixed
  • Docs/guides updated
  • Example created (starter template on JSBin)
• Reviewed by Two Core Contributors

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[codecov]

Codecov Report

Merging #7483 (ef55d65) into main (4d1fb4a) will increase coverage by 0.23%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #7483      +/-   ##
==========================================
+ Coverage   79.72%   79.96%   +0.23%     
==========================================
  Files         116      116              
  Lines        7296     7296              
  Branches     1754     1754              
==========================================
+ Hits         5817     5834      +17     
+ Misses       1479     1462      -17     

Impacted Files	Coverage Δ
src/js/utils/browser.js	54.32% <0.00%> (ø)
src/js/player.js	87.64% <0.00%> (+0.40%)	⬆️
src/js/tech/tech.js	83.38% <0.00%> (+0.59%)	⬆️
src/js/tech/html5.js	64.92% <0.00%> (+1.30%)	⬆️
...rc/js/control-bar/progress-control/time-tooltip.js	84.61% <0.00%> (+2.56%)	⬆️
src/js/control-bar/picture-in-picture-toggle.js	81.81% <0.00%> (+4.54%)	⬆️
src/js/control-bar/control-bar.js	100.00% <0.00%> (+16.66%)	⬆️

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[welcome]

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