[perl6/specs] f9061b: Clarify note

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/perl6/specs
  Commit: f9061b3ee7a777e77e89f04fba47a0ec5a8954e0
      
https://github.com/perl6/specs/commit/f9061b3ee7a777e77e89f04fba47a0ec5a8954e0
  Author: Zoffix Znet <zoffixz...@users.noreply.github.com>
  Date:   2016-06-10 (Fri, 10 Jun 2016)

  Changed paths:
    M html/perl.css

  Log Message:
  -----------
  Clarify note