[Checkins] [zopefoundation/Zope] 15993f: Fix typo (#911)

[Jürgen Gmach]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/Zope
  Commit: 15993f9b5b7b2f7bed525ccc00902436dd6f714f
      https://github.com/zopefoundation/Zope/commit/15993f9b5b7b2f7bed525ccc00902436dd6f714f
  Author: Jürgen Gmach <juergen.gmach at googlemail.com>
  Date:   2020-10-09 (Fri, 09 Oct 2020)

  Changed paths:
    M docs/operation.rst

  Log Message:
  -----------
  Fix typo (#911)