[Perl/perl5] 77242f: fix issue references in tests from 282d9dfeb4

[Hugo van der Sanden via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 77242fe8e71200b51aaf77de4056c274e22d8805
      
https://github.com/Perl/perl5/commit/77242fe8e71200b51aaf77de4056c274e22d8805
  Author: Hugo van der Sanden <h...@crypt.org>
  Date:   2021-01-05 (Tue, 05 Jan 2021)

  Changed paths:
    M t/op/aassign.t

  Log Message:
  -----------
  fix issue references in tests from 282d9dfeb4

Some cut-n-paste errors.