[Perl/perl5] 2412fa: release_schedule.pod: Tick off v5.37.1 release

[Matthew Horsfall (alh)]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 2412fa398868161dc2814d69dd76df51767462f9
      
https://github.com/Perl/perl5/commit/2412fa398868161dc2814d69dd76df51767462f9
  Author: Matthew Horsfall <wolfs...@gmail.com>
  Date:   2022-06-20 (Mon, 20 Jun 2022)

  Changed paths:
    M Porting/release_schedule.pod

  Log Message:
  -----------
  release_schedule.pod: Tick off v5.37.1 release