[Perl/perl5] b43f4e: Use C<> for code example in perldelta.pod

[Daniel Böhmer via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: b43f4ea6e8dd9922478bfa91d8bc221cc52a59e3
      
https://github.com/Perl/perl5/commit/b43f4ea6e8dd9922478bfa91d8bc221cc52a59e3
  Author: Daniel Böhmer <dboeh...@cpan.org>
  Date:   2023-06-23 (Fri, 23 Jun 2023)

  Changed paths:
    M pod/perldelta.pod

  Log Message:
  -----------
  Use C<> for code example in perldelta.pod