[Perl/perl5] 4d9b15: perlapi: Fix strftime inaccuracies, clarify

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 4d9b15204f627d9337665bd88adc71cd3bd1ca55
      
https://github.com/Perl/perl5/commit/4d9b15204f627d9337665bd88adc71cd3bd1ca55
  Author: Karl Williamson <k...@cpan.org>
  Date:   2023-05-03 (Wed, 03 May 2023)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  perlapi: Fix strftime inaccuracies, clarify

The deficiency mention removed by this commit was fixed earlier, but the
documentation did not get updated.