[Perl/perl5] c37488: fix typo in regex

[Karen Etheridge via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: c37488e18cf95349c008c4a44baa480e304acb1e
      
https://github.com/Perl/perl5/commit/c37488e18cf95349c008c4a44baa480e304acb1e
  Author: Karen Etheridge <et...@cpan.org>
  Date:   2023-02-20 (Mon, 20 Feb 2023)

  Changed paths:
    M Porting/make-rmg-checklist

  Log Message:
  -----------
  fix typo in regex