[Perl/perl5] 06d9a3: Tick off 5.31.6, released 2019-11-20

[Matthew Horsfall (alh)]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 06d9a3d13e993e5cadfae73035700bd536e31d44
      
https://github.com/Perl/perl5/commit/06d9a3d13e993e5cadfae73035700bd536e31d44
  Author: Matthew Horsfall <wolfs...@gmail.com>
  Date:   2019-12-16 (Mon, 16 Dec 2019)

  Changed paths:
    M Porting/release_schedule.pod

  Log Message:
  -----------
  Tick off 5.31.6, released 2019-11-20