[Checkins] [zopefoundation/grokcore.site] 6221cf: update changes

[Jan-Jaap Driessen]

  Branch: refs/heads/fix-deprecation-warning
  Home:   https://github.com/zopefoundation/grokcore.site
  Commit: 6221cff9d19632e1abc7d48a044156231a635be3
      https://github.com/zopefoundation/grokcore.site/commit/6221cff9d19632e1abc7d48a044156231a635be3
  Author: Jan-Jaap Driessen <jdriessen at minddistrict.com>
  Date:   2020-06-10 (Wed, 10 Jun 2020)

  Changed paths:
    M CHANGES.txt

  Log Message:
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  update changes