chore(nix): Update dependencies.

Flake lock file updates:

• Updated input 'flake-compat':
    'github:edolstra/flake-compat/35bb57c0c8d8b62bbfd284272c928ceb64ddbde9' (2023-01-17)
  → 'github:edolstra/flake-compat/0f9255e01c2351cc7d116c072cb317785dd33b33' (2023-10-04)
• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/59cf3f1447cfc75087e7273b04b31e689a8599fb' (2023-08-01)
  → 'github:hercules-ci/flake-parts/c9afaba3dfa4085dbd2ccb38dfade5141e33d9d4' (2023-10-03)
• Updated input 'flake-parts/nixpkgs-lib':
    'github:NixOS/nixpkgs/9e1960bc196baf6881340d53dccb203a951745a2?dir=lib' (2023-08-01)
  → 'github:NixOS/nixpkgs/f5892ddac112a1e9b3612c39af1b72987ee5783a?dir=lib' (2023-09-29)
• Updated input 'gitignore':
    'github:hercules-ci/gitignore.nix/a20de23b925fd8264fd7fad6454652e142fd7f73' (2022-08-14)
  → 'github:hercules-ci/gitignore.nix/9e21c80adf67ebcb077d75bd5e7d724d21eeafd6' (2023-09-07)
• Updated input 'hacknix':
    'github:hackworthltd/hacknix/7d0d518171938c2b95f7cb8da58f291f5ed22f30' (2023-07-30)
  → 'github:hackworthltd/hacknix/d4ac93da22f1d83e2a264b63c6f5d615e21e46b7' (2023-10-06)
• Updated input 'hacknix/flake-compat':
    'github:edolstra/flake-compat/35bb57c0c8d8b62bbfd284272c928ceb64ddbde9' (2023-01-17)
  → 'github:edolstra/flake-compat/0f9255e01c2351cc7d116c072cb317785dd33b33' (2023-10-04)
• Updated input 'hacknix/flake-parts':
    'github:hercules-ci/flake-parts/8e8d955c22df93dbe24f19ea04f47a74adbdc5ec' (2023-07-04)
  → 'github:hercules-ci/flake-parts/c9afaba3dfa4085dbd2ccb38dfade5141e33d9d4' (2023-10-03)
• Updated input 'hacknix/flake-parts/nixpkgs-lib':
    'github:NixOS/nixpkgs/4bc72cae107788bf3f24f30db2e2f685c9298dc9?dir=lib' (2023-06-29)
  → 'github:NixOS/nixpkgs/f5892ddac112a1e9b3612c39af1b72987ee5783a?dir=lib' (2023-09-29)
• Updated input 'hacknix/gitignore-nix':
    'github:hercules-ci/gitignore.nix/a20de23b925fd8264fd7fad6454652e142fd7f73' (2022-08-14)
  → 'github:hercules-ci/gitignore.nix/9e21c80adf67ebcb077d75bd5e7d724d21eeafd6' (2023-09-07)
• Updated input 'hacknix/nix-darwin':
    'github:LnL7/nix-darwin/16c07487ac9bc59f58b121d13160c67befa3342e' (2023-07-27)
  → 'github:LnL7/nix-darwin/8b6ea26d5d2e8359d06278364f41fbc4b903b28a' (2023-10-03)
• Updated input 'hacknix/nixos-generators':
    'github:nix-community/nixos-generators/b1171de4d362c022130c92d7c8adc4bf2b83d586' (2023-07-23)
  → 'github:nix-community/nixos-generators/150f38bd1e09e20987feacb1b0d5991357532fb5' (2023-09-30)
• Updated input 'hacknix/nixos-generators/nixlib':
    'github:nix-community/nixpkgs.lib/02fea408f27186f139153e1ae88f8ab2abd9c22c' (2023-07-16)
  → 'github:nix-community/nixpkgs.lib/f5af57d3ef9947a70ac86e42695231ac1ad00c25' (2023-09-03)
• Updated input 'hacknix/nixpkgs':
    'github:NixOS/nixpkgs/f68a459f743733d53a0f5f9ce4b7b70eea5f8722' (2023-07-28)
  → 'github:NixOS/nixpkgs/a2eb207f45e4a14a1e3019d9e3863d1e208e2295' (2023-10-06)
• Updated input 'hacknix/pre-commit-hooks-nix':
    'github:cachix/pre-commit-hooks.nix/9289996dcac62fd45836db7c07b87d2521eb526d' (2023-07-27)
  → 'github:cachix/pre-commit-hooks.nix/66c352d33e0907239e4a69416334f64af2c685cc' (2023-10-05)
• Updated input 'pre-commit-hooks-nix':
    'github:cachix/pre-commit-hooks.nix/ebb43bdacd1af8954d04869c77bc3b61fde515e4' (2023-08-03)
  → 'github:cachix/pre-commit-hooks.nix/66c352d33e0907239e4a69416334f64af2c685cc' (2023-10-05)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/fab56c8ce88f593300cd8c7351c9f97d10c333c5' (2023-08-01)
  → 'github:numtide/treefmt-nix/720bd006d855b08e60664e4683ccddb7a9ff614a' (2023-09-27)