[GRASS-git] [OSGeo/grass] 0fe171: contributing: release procedure updates (G82) (#3031)

[Markus Neteler]

  Branch: refs/heads/releasebranch_8_2
  Home:   https://github.com/OSGeo/grass
  Commit: 0fe1712eb1412de21d10a922563c0ee0aa35d3ac
      https://github.com/OSGeo/grass/commit/0fe1712eb1412de21d10a922563c0ee0aa35d3ac
  Author: Markus Neteler <neteler at osgeo.org>
  Date:   2023-06-20 (Tue, 20 Jun 2023)

  Changed paths:
    M doc/howto_release.md
    M doc/infrastructure.md

  Log Message:
  -----------
  contributing: release procedure updates (G82) (#3031)

- markdown cosmetics and some outdated version numbers updated.
- fix path to helper script
- Use subsections; add Publish release section
- osgeo8-grass -> osgeo7-grass
- Merge in improvements from #2707 (replaces #2707)
- Attempt to merge in improvements from #2414

Note: PRs for the release branches will be created separately (do not forward-port this PR).