flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/10ecda252ce1b3b1d6403caeadbcc8f30d5ab796' (2022-09-30)
  → 'github:NixOS/nixpkgs/301aada7a64812853f2e2634a530ef5d34505048' (2022-10-21)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/2a4f1cfaa01b8b31edc7d3004454c4a0c38d50d8' (2022-09-30)
  → 'github:cachix/pre-commit-hooks.nix/e6c8efee1c108bb27522b9fd25b1cd0eb3288681' (2022-10-19)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/f48045bb46f6eef8314b9fe01b7db9dcdbca1e10' (2022-10-01)
  → 'github:oxalica/rust-overlay/8ffc63427df1dc7e53fb96cb13b130028c258202' (2022-10-22)