[Perl/perl5] 6f8fa8: perldelta: Document new sv_strftime_foo functions

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 6f8fa8373791a06a6c9d90e4ed0985f6725b28fe
      
https://github.com/Perl/perl5/commit/6f8fa8373791a06a6c9d90e4ed0985f6725b28fe
  Author: Karl Williamson <k...@cpan.org>
  Date:   2023-08-20 (Sun, 20 Aug 2023)

  Changed paths:
    M pod/perldelta.pod

  Log Message:
  -----------
  perldelta: Document new sv_strftime_foo functions