flake.lock: Update

Flake lock file updates:

• Updated input 'git-hooks':
    'github:cachix/git-hooks.nix/d8c02f0ffef0ef39f6063731fc539d8c71eb463a' (2024-12-08)
  → 'github:cachix/git-hooks.nix/0ddd26d0925f618c3a5d85a4fa5eb1e23a09491d' (2024-12-17)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/64e9404f308e0f0a0d8cdd7c358f74e34802494b' (2024-12-12)
  → 'github:NixOS/nixpkgs/72d11d40b9878a67c38f003c240c2d2e1811e72a' (2024-12-18)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/0ce9d149d99bc383d1f2d85f31f6ebd146e46085' (2024-12-09)
  → 'github:numtide/treefmt-nix/65712f5af67234dad91a5a4baee986a8b62dbf8f' (2024-12-20)