[Perl/perl5] 14ace7: perlfunc: %j format is no long unportable

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 14ace789037370b25dd0d513dcc251e70290d72f
      
https://github.com/Perl/perl5/commit/14ace789037370b25dd0d513dcc251e70290d72f
  Author: Karl Williamson <k...@cpan.org>
  Date:   2024-02-14 (Wed, 14 Feb 2024)

  Changed paths:
    M pod/perlfunc.pod

  Log Message:
  -----------
  perlfunc: %j format is no long unportable

Clarify its pod