[GRASS-git] [OSGeo/grass] 2a7e70: docker: CI update and simplification (#3075)

[Carmen Tawalika]

  Branch: refs/heads/releasebranch_8_2
  Home:   https://github.com/OSGeo/grass
  Commit: 2a7e701058302b7cb0b91ef95ce81028db0f6bbb
      https://github.com/OSGeo/grass/commit/2a7e701058302b7cb0b91ef95ce81028db0f6bbb
  Author: Carmen Tawalika <mmacata at users.noreply.github.com>
  Date:   2023-08-18 (Fri, 18 Aug 2023)

  Changed paths:
    M .github/workflows/docker.yml

  Log Message:
  -----------
  docker: CI update and simplification (#3075)

* simplify docker gh workflow (see PR for details)