l10n: zh_TW: update translation for Git 2.50

[pan93412]

Some translation changes:

• Unified "cruft" related terms from "廢棄" to "無用" (e.g., cruft packs → 無用包, cruft objects → 無用物件)
• Changed "離開碼" to "結束狀態碼" (exit code → exit status code)
• Changed "得分" to "分數" (score)

[github-actions]

Errors and warnings found by git-po-helper in workflow #1008:

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INFO [po/zh_TW.po@4b5f165]	5819 translated messages. 
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ERROR commit 4b5f165: empty body of the commit message, no s-o-b signature 
INFO checking commits: 0 passed, 1 failed.        
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INFO downloading pot file from https://github.com/git-l10n/pot-changes/raw/pot/master/po/git.pot 

ERROR: fail to execute "git-po-helper check-commits"

[pan93412]

r? @jiangxin. I hope I don't miss the update window!