flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/b43bb235efeab5324c5e486882ef46749188eee2' (2024-01-23)
  → 'github:NixOS/nixpkgs/160b762eda6d139ac10ae081f8f78d640dd523eb' (2024-01-27)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/f56597d53fd174f796b5a7d3ee0b494f9e2285cc' (2024-01-20)
  → 'github:cachix/pre-commit-hooks.nix/7c54e08a689b53c8a1e5d70169f2ec9e2a68ffaf' (2024-01-28)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/23f601bfdef75e21fe8854e24a043bb642201794' (2024-01-24)
  → 'github:numtide/treefmt-nix/c6153c2a3ff4c38d231e3ae99af29b87f1df5901' (2024-01-28)