What's Changed

• nix: 2.28.3 -> 2.29.0 by @Mic92 in #239
  Release notes: https://nix.dev/manual/nix/2.29/release-notes/rl-2.29
• Automate nix updates in CI by @Mic92 in #241

Full Changelog: v31.3.0...v31.4.0