[GRASS-git] [OSGeo/grass] ecf4a1: CI: upgrade actions, runners, yamllint format (#2855)

[Nicklas Larsson]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: ecf4a19c0dfd775b3e92691b3908d5d9e2958a46
      https://github.com/OSGeo/grass/commit/ecf4a19c0dfd775b3e92691b3908d5d9e2958a46
  Author: Nicklas Larsson <n_larsson at yahoo.com>
  Date:   2023-02-24 (Fri, 24 Feb 2023)

  Changed paths:
    M .github/FUNDING.yml
    M .github/workflows/ci.yml
    M .github/workflows/flake8.yml

  Log Message:
  -----------
  CI: upgrade actions, runners, yamllint format (#2855)

Actions are upgraded to latest.
The deprecated Ubuntu 18.04 runner was bumped to 22.04.
Yaml files format are now corrected using yamllint.