[Checkins] [zopefoundation/BTrees] 8da13b: Fix GH issue URL

[Marius Gedminas]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/BTrees
  Commit: 8da13bfa4f714ac6e19cd5f2264b7bd6552213c2
      https://github.com/zopefoundation/BTrees/commit/8da13bfa4f714ac6e19cd5f2264b7bd6552213c2
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2019-11-21 (Thu, 21 Nov 2019)

  Changed paths:
    M CHANGES.rst

  Log Message:
  -----------
  Fix GH issue URL