flake.lock: Update

Flake lock file updates:

• Updated input 'flake-utils':
    'github:numtide/flake-utils/b1d9ab70662946ef0850d488da1c9019f3a9752a' (2024-03-11)
  → 'github:numtide/flake-utils/c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a' (2024-09-17)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/1355a0cbfeac61d785b7183c0caaec1f97361b43' (2024-09-10)
  → 'github:nixos/nixpkgs/2768c7d042a37de65bb1b5b3268fc987e534c49d' (2024-10-23)
• Updated input 'pyproject-nix':
    'github:nix-community/pyproject.nix/6c56846759ba16382bc2bdbee42c2f56c21654be' (2024-09-11)
  → 'github:nix-community/pyproject.nix/b9d97172161301c82cd978123c61abc81b88537e' (2024-10-23)
• Added input 'pyproject-nix/lix-unit':
    'github:adisbladis/lix-unit/59c489dbc5b27a83fadc94fde2c2b69abb4c0e80' (2024-09-26)
• Added input 'pyproject-nix/lix-unit/mdbook-nixdoc':
    follows 'pyproject-nix/mdbook-nixdoc'
• Added input 'pyproject-nix/lix-unit/nix-github-actions':
    follows 'pyproject-nix/nix-github-actions'
• Added input 'pyproject-nix/lix-unit/nixpkgs':
    follows 'pyproject-nix/nixpkgs'
• Added input 'pyproject-nix/lix-unit/treefmt-nix':
    follows 'pyproject-nix/treefmt-nix'
• Updated input 'pyproject-nix/treefmt-nix':
    'github:numtide/treefmt-nix/3ffd842a5f50f435d3e603312eefa4790db46af5' (2024-08-28)
  → 'github:numtide/treefmt-nix/1bff2ba6ec22bc90e9ad3f7e94cca0d37870afa3' (2024-09-25)