[Checkins] [zopefoundation/Zope] e88c1e: Fix typo (#769)

[Jürgen Gmach]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/Zope
  Commit: e88c1e7f0905fa8381e4c458fce856711e07b8ef
      https://github.com/zopefoundation/Zope/commit/e88c1e7f0905fa8381e4c458fce856711e07b8ef
  Author: Jürgen Gmach <juergen.gmach at googlemail.com>
  Date:   2020-01-28 (Tue, 28 Jan 2020)

  Changed paths:
    M docs/zdgbook/Security.rst

  Log Message:
  -----------
  Fix typo (#769)