[GRASS-git] [OSGeo/grass-website] a917fe: releases: add missing release entries (#302)

[Markus Neteler]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass-website
  Commit: a917fec2389859ca17d4afa3915ee19ca7c46c89
      https://github.com/OSGeo/grass-website/commit/a917fec2389859ca17d4afa3915ee19ca7c46c89
  Author: Markus Neteler <neteler at gmail.com>
  Date:   2022-04-28 (Thu, 28 Apr 2022)

  Changed paths:
    M content/about/history/releases.md

  Log Message:
  -----------
  releases: add missing release entries (#302)

- 7.8.6, 7.8.7
- 8.0.0
* added GRASS GIS 8.x release entries