[Perl/perl5] f1902d: t/re/charset: spell the locale when setlocale() fails

[Дилян Палаузов via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: f1902d2eb20567174c618f49d673cf81029a556a
      
https://github.com/Perl/perl5/commit/f1902d2eb20567174c618f49d673cf81029a556a
  Author: Дилян Палаузов <git-...@aegee.org>
  Date:   2024-01-13 (Sat, 13 Jan 2024)

  Changed paths:
    M t/re/charset.t

  Log Message:
  -----------
  t/re/charset: spell the locale when setlocale() fails

Closes https://github.com/Perl/perl5/issues/21805