[Perl/perl5] c05434: Simplify copyright years

[Elvin Aslanov via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: c05434dd5e129bbae33020bc1d041ecb058215ae
      
https://github.com/Perl/perl5/commit/c05434dd5e129bbae33020bc1d041ecb058215ae
  Author: Elvin Aslanov <rwp.prim...@gmail.com>
  Date:   2023-02-08 (Wed, 08 Feb 2023)

  Changed paths:
    M README

  Log Message:
  -----------
  Simplify copyright years

PR originally submitted by @Yahasana in Perl#19163