[GRASS-git] [OSGeo/grass] e577dc: howto_release.md: add close of GH milestone

[Markus Neteler]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass
  Commit: e577dc8cbd4bc8ccd9ba372435ee65621b458cd5
      https://github.com/OSGeo/grass/commit/e577dc8cbd4bc8ccd9ba372435ee65621b458cd5
  Author: Markus Neteler <neteler at gmail.com>
  Date:   2020-12-22 (Tue, 22 Dec 2020)

  Changed paths:
    M doc/howto_release.md

  Log Message:
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  howto_release.md: add close of GH milestone