l10n: Updated translation for vi-2.52

[Nekosha]

There are some untranslated messages, since I currently lack time to review the new translations.

Will update in next Git release.

[github-actions]

Warnings found by git-po-helper in workflow #1119:

------------------------------------------------------------------------------
INFO [po/vi.po@c7b5e0e]	6014 translated messages, 51 untranslated messages. 
INFO checking commits: 1 passed.                  
------------------------------------------------------------------------------
INFO downloading pot file from https://github.com/git-l10n/pot-changes/raw/pot/master/po/git.pot 
------------------------------------------------------------------------------
WARNING [po/vi.po@c7b5e0e]	51 untranslated string(s) in your 'po/XX.po' 
WARNING [po/vi.po@c7b5e0e]                           
WARNING [po/vi.po@c7b5e0e]	  > po/XX.po:5921: this message is untranslated 
WARNING [po/vi.po@c7b5e0e]	  > po/XX.po:5925: this message is untranslated 
WARNING [po/vi.po@c7b5e0e]	  > po/XX.po:5929: this message is untranslated 
WARNING [po/vi.po@c7b5e0e]	  > ...                   
WARNING [po/vi.po@c7b5e0e]