[Perl/perl5] bf3d48: fix release year for 5.40

[Karen Etheridge via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: bf3d48c57420200d2760d51125d9e16c76137f38
      
https://github.com/Perl/perl5/commit/bf3d48c57420200d2760d51125d9e16c76137f38
  Author: Karen Etheridge <et...@cpan.org>
  Date:   2023-11-19 (Sun, 19 Nov 2023)

  Changed paths:
    M Porting/release_announcement_template.txt

  Log Message:
  -----------
  fix release year for 5.40