flake.lock: Update

Flake lock file updates:

• Updated input 'flake-utils':
    'github:numtide/flake-utils/ff7b65b44d01cf9ba6a71320833626af21126384' (2023-09-12)
  → 'github:numtide/flake-utils/4022d587cbbfd70fe950c1e2083a02621806a725' (2023-12-04)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/85f1ba3e51676fa8cc604a3d863d729026a6b8eb' (2023-11-04)
  → 'github:NixOS/nixpkgs/5f64a12a728902226210bf01d25ec6cbb9d9265b' (2023-12-24)
• Updated input 'poetry2nix':
    'github:nix-community/poetry2nix/bf0601d5d9ae7334fa80f5f7c9648009390046ca' (2023-11-07)
  → 'github:nix-community/poetry2nix/528d500ea826383cc126a9be1e633fc92b19ce5d' (2023-12-25)
• Updated input 'poetry2nix/treefmt-nix':
    'github:numtide/treefmt-nix/5deb8dc125a9f83b65ca86cf0c8167c46593e0b1' (2023-10-27)
  → 'github:numtide/treefmt-nix/e82f32aa7f06bbbd56d7b12186d555223dc399d1' (2023-11-12)