[GRASS-git] [OSGeo/grass-website] ba9870: Change grass79 to grass80 (#264)

[Martin Landa]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass-website
  Commit: ba987061925f1ac172f7adfe2124d788865d597f
      https://github.com/OSGeo/grass-website/commit/ba987061925f1ac172f7adfe2124d788865d597f
  Author: Martin Landa <landa.martin at gmail.com>
  Date:   2021-09-17 (Fri, 17 Sep 2021)

  Changed paths:
    M content/download/docker.en.md
    M content/download/linux.en.md
    M content/download/mac.en.md
    M content/download/windows.en.md
    M content/learn/manuals.md
    M themes/grass/layouts/partials/quicklinks.html

  Log Message:
  -----------
  Change grass79 to grass80 (#264)

* grass79 -> grass80
* manuals: grass76 old -> legacy
* git master -> main

Co-authored-by: Veronica Andreo <veroandreo at gmail.com>