nix: update flake.lock

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/e5d10a24b66c3ea8f150e47dfdb0416ab7c3390e' (2024-05-02)
  → 'github:hercules-ci/flake-parts/8dc45382d5206bd292f9c2768b8058a8fd8311d9' (2024-05-16)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/ad7efee13e0d216bf29992311536fce1d3eefbef' (2024-05-06)
  → 'github:NixOS/nixpkgs/e2dd4e18cc1c7314e24154331bae07df76eb582f' (2024-05-26)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/c6aaf729f34a36c445618580a9f95a48f5e4e03f' (2024-04-25)
  → 'github:numtide/treefmt-nix/2fba33a182602b9d49f0b2440513e5ee091d838b' (2024-05-17)