flake.lock: Update

Flake lock file updates:

• Updated input 'flake-utils':
    'github:numtide/flake-utils/f9e7cf818399d17d347f847525c5a5a8032e4e44' (2023-08-23)
  → 'github:numtide/flake-utils/ff7b65b44d01cf9ba6a71320833626af21126384' (2023-09-12)
• Updated input 'nix-filter':
    'github:numtide/nix-filter/ac030bd9ba98e318e1f4c4328d60766ade8ebe8b' (2023-09-04)
  → 'github:numtide/nix-filter/d6381c442f79f2f1fdfde00521c3d15d6c21218e' (2023-09-11)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/0bcdfa925399c4dfc052ef9b0b03d92d7481831c' (2023-09-08)
  → 'github:NixOS/nixpkgs/973d6ebcbf54f7030e10ef10bc0c5e7729cfc973' (2023-09-15)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/7e3517c03d46159fdbf8c0e5c97f82d5d4b0c8fa' (2023-08-17)
  → 'github:cachix/pre-commit-hooks.nix/4f883a76282bc28eb952570afc3d8a1bf6f481d7' (2023-09-10)