flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/c5924154f000e6306030300592f4282949b2db6c' (2022-10-08)
  → 'github:NixOS/nixpkgs/4428e23312933a196724da2df7ab78eb5e67a88e' (2022-10-14)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/11aff801aa0ea1fb02ae43e61f7cdf610f5fe2e5' (2022-10-10)
  → 'github:cachix/pre-commit-hooks.nix/94b0f300dd9a23d4e851aa2a947a1511d3410e2d' (2022-10-12)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/af29a900f10dd6e467622202fb4f6d944d72a3a6' (2022-10-10)
  → 'github:oxalica/rust-overlay/f55e3d741c6fe357d1e1bea50f5916863c831fdc' (2022-10-15)