[GRASS-git] [OSGeo/grass-website] 6f99e0: Docker download: Update docker organization (#371)

[Carmen Tawalika]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass-website
  Commit: 6f99e0c6145f5d8a38dc1e38842d732f4c476b39
      https://github.com/OSGeo/grass-website/commit/6f99e0c6145f5d8a38dc1e38842d732f4c476b39
  Author: Carmen Tawalika <mmacata at users.noreply.github.com>
  Date:   2023-08-18 (Fri, 18 Aug 2023)

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

  Log Message:
  -----------
  Docker download: Update docker organization (#371)

* Docker download: Update docker organization
* update docker image sizes
* Introduce current_version_underscore and related shortcodes
* add wxgui versions
* Update docker.en.md
* rename latest to main for docker preview tag
* fix current version tags

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Co-authored-by: Markus Neteler <neteler at osgeo.org>