[GRASS-git] [OSGeo/grass-website] 8fe87f: update download pages to 8.3.0 (current) (#375)

[Martin Landa]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass-website
  Commit: 8fe87f6e0101ecf407d88a46fc9eaa9c9d0033bd
      https://github.com/OSGeo/grass-website/commit/8fe87f6e0101ecf407d88a46fc9eaa9c9d0033bd
  Author: Martin Landa <landa.martin at gmail.com>
  Date:   2023-07-03 (Mon, 03 Jul 2023)

  Changed paths:
    M content/download/linux.en.md
    M data/grass.json

  Log Message:
  -----------
  update download pages to 8.3.0 (current) (#375)