flake.lock: Update

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/88a2cd8166694ba0b6cb374700799cec53aef527' (2024-01-01)
  → 'github:hercules-ci/flake-parts/07f6395285469419cf9d078f59b5b49993198c00' (2024-01-11)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/d44d59d2b5bd694cd9d996fd8c51d03e3e9ba7f7' (2023-12-31)
  → 'github:NixOS/nixpkgs/ea780f3de2d169f982564128804841500e85e373' (2024-01-14)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/e434da615ef74187ba003b529cc72f425f5d941e' (2024-01-02)
  → 'github:numtide/treefmt-nix/04f25d7bec9fb29d2c3bacaa48a3304840000d36' (2024-01-07)