[GRASS-git] [OSGeo/grass-website] 06f43f: fix broken links

[Markus Neteler]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass-website
  Commit: 06f43fa08b47e0a9cf9a6a692df4a01b4e10d3a7
      https://github.com/OSGeo/grass-website/commit/06f43fa08b47e0a9cf9a6a692df4a01b4e10d3a7
  Author: Markus Neteler <neteler at gmail.com>
  Date:   2020-07-28 (Tue, 28 Jul 2020)

  Changed paths:
    M content/learn/overview.md

  Log Message:
  -----------
  fix broken links