[Perl/perl5] aa4b03: perldelta.pod: Link PPC's

[Elvin Aslanov via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: aa4b032d16dd6ad23988f50edfb9fc3a2b37c0d1
      
https://github.com/Perl/perl5/commit/aa4b032d16dd6ad23988f50edfb9fc3a2b37c0d1
  Author: Elvin Aslanov <rwp.prim...@gmail.com>
  Date:   2023-06-28 (Wed, 28 Jun 2023)

  Changed paths:
    M pod/perldelta.pod

  Log Message:
  -----------
  perldelta.pod: Link PPC's

People might not get what PPC is.

Let's make them visible by linking to the Perl/PPCs repository's previewable 
markdown files.