Tweak gitlab CI

Dependencies

• [2] AG72J7RH Add .gitlab-ci.yml
• [3] 63ZV3FMR Tweak CI
• [4] VXZ5QMIE Fix CI

Change contents

• replacement in .gitlab-ci.yml at line 6
  [2.52]→[2.52:62](∅→∅)
  − - nix
  [2.52]

  [2.62]
  + - nix-podman