[Perl/perl5] c391b9: Tick release 5.39.2

[Paul Evans via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: c391b9482f640b45439ea042724897849a87ded1
      
https://github.com/Perl/perl5/commit/c391b9482f640b45439ea042724897849a87ded1
  Author: Paul "LeoNerd" Evans <leon...@leonerd.org.uk>
  Date:   2023-08-21 (Mon, 21 Aug 2023)

  Changed paths:
    M Porting/release_schedule.pod

  Log Message:
  -----------
  Tick release 5.39.2