[Checkins] [zopefoundation/Zope] eb8490: - make the RTD build work again [ci skip]

[Jens Vagelpohl]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/Zope
  Commit: eb8490e28fbfca13107659282b9b7a9128f92f0e
      https://github.com/zopefoundation/Zope/commit/eb8490e28fbfca13107659282b9b7a9128f92f0e
  Author: Jens Vagelpohl <jens at netz.ooo>
  Date:   2019-06-29 (Sat, 29 Jun 2019)

  Changed paths:
    M requirements-rtd.txt

  Log Message:
  -----------
  - make the RTD build work again [ci skip]