[Perl/perl5] 425d89: Document appearance of "defer" feature in perlsyn.pod

[Daniel Böhmer via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 425d89e38464cc2c460078ca16f4022c1fa4c62d
      
https://github.com/Perl/perl5/commit/425d89e38464cc2c460078ca16f4022c1fa4c62d
  Author: Daniel Böhmer <p...@daniel-boehmer.de>
  Date:   2024-02-06 (Tue, 06 Feb 2024)

  Changed paths:
    M pod/perlsyn.pod

  Log Message:
  -----------
  Document appearance of "defer" feature in perlsyn.pod