[GRASS-git] [OSGeo/grass-addons] ad240a: CI: drop python 3.6 and main branch compilation

[Markus Neteler]

  Branch: refs/heads/grass7
  Home:   https://github.com/OSGeo/grass-addons
  Commit: ad240a1e026252b47c34ab3fb91ed525d277fcfe
      https://github.com/OSGeo/grass-addons/commit/ad240a1e026252b47c34ab3fb91ed525d277fcfe
  Author: Markus Neteler <neteler at gmail.com>
  Date:   2022-04-26 (Tue, 26 Apr 2022)

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

  Log Message:
  -----------
  CI: drop python 3.6 and main branch compilation