[Perl/perl5] 799506: perldebug: clarify the readline support

[x-yuri via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 79950615ae6d4a4ca72bf1b913b8e2842bd927e4
      
https://github.com/Perl/perl5/commit/79950615ae6d4a4ca72bf1b913b8e2842bd927e4
  Author: x-yuri <x.yuri...@gmail.com>
  Date:   2023-12-05 (Tue, 05 Dec 2023)

  Changed paths:
    M pod/perldebug.pod

  Log Message:
  -----------
  perldebug: clarify the readline support