[GRASS-git] [OSGeo/grass] 7be7cf: CI: Run Docker for all release branches (#1975)

[Vaclav Petras]

  Branch: refs/heads/main
  Home:   https://github.com/OSGeo/grass
  Commit: 7be7cf9b0d8f916ab244b64b48cff1d0b1b57c48
      https://github.com/OSGeo/grass/commit/7be7cf9b0d8f916ab244b64b48cff1d0b1b57c48
  Author: Vaclav Petras <wenzeslaus at gmail.com>
  Date:   2021-11-12 (Fri, 12 Nov 2021)

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

  Log Message:
  -----------
  CI: Run Docker for all release branches (#1975)

Adding all release branches (now v8, later v9 etc.), excluding v7 except for 7.8 (lower versions than 7 are not in this repo).