[Checkins] [zopefoundation/zope.sendmail] 28fe9a: Update changelog

[Marius Gedminas]

  Branch: refs/heads/appveyor
  Home:   https://github.com/zopefoundation/zope.sendmail
  Commit: 28fe9afa09fa11b58307ece8bb1889fadce31fec
      https://github.com/zopefoundation/zope.sendmail/commit/28fe9afa09fa11b58307ece8bb1889fadce31fec
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2020-08-20 (Thu, 20 Aug 2020)

  Changed paths:
    M CHANGES.rst

  Log Message:
  -----------
  Update changelog