[GRASS-git] [OSGeo/grass-website] 4600a6: Update README.md

[Nicolas Bozon]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass-website
  Commit: 4600a6c46a89fe365fefd664bbae564b5b7d57d1
      https://github.com/OSGeo/grass-website/commit/4600a6c46a89fe365fefd664bbae564b5b7d57d1
  Author: Nicolas Bozon <nicolas.bozon at gmail.com>
  Date:   2019-12-07 (Sat, 07 Dec 2019)

  Changed paths:
    M README.md

  Log Message:
  -----------
  Update README.md