l10n: vi.po (2211t): Updated one new string

Signed-off-by: Tran Ngoc Quan <vnwildman@gmail.com>
Merge branch 'master' of git://github.com/vnwildman/git

* 'master' of git://github.com/vnwildman/git:
  l10n: vi.po (2211t): Updated one new string