[Perl/perl5] cafd81: Correct sort docs about value of the sort func.

[Andy Lester via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: cafd81a74c4da0b4d981b1c40f72dfa428b6189a
      
https://github.com/Perl/perl5/commit/cafd81a74c4da0b4d981b1c40f72dfa428b6189a
  Author: Andy Lester <a...@petdance.com>
  Date:   2023-01-14 (Sat, 14 Jan 2023)

  Changed paths:
    M pod/perlfunc.pod

  Log Message:
  -----------
  Correct sort docs about value of the sort func.