flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/c5924154f000e6306030300592f4282949b2db6c' (2022-10-08)
  → 'github:NixOS/nixpkgs/301aada7a64812853f2e2634a530ef5d34505048' (2022-10-21)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/11aff801aa0ea1fb02ae43e61f7cdf610f5fe2e5' (2022-10-10)
  → 'github:cachix/pre-commit-hooks.nix/e6c8efee1c108bb27522b9fd25b1cd0eb3288681' (2022-10-19)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/af29a900f10dd6e467622202fb4f6d944d72a3a6' (2022-10-10)
  → 'github:oxalica/rust-overlay/8ffc63427df1dc7e53fb96cb13b130028c258202' (2022-10-22)