flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/10ecda252ce1b3b1d6403caeadbcc8f30d5ab796' (2022-09-30)
  → 'github:NixOS/nixpkgs/598f83ebeb2235435189cf84d844b8b73e858e0f' (2022-10-06)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/2a4f1cfaa01b8b31edc7d3004454c4a0c38d50d8' (2022-09-30)
  → 'github:cachix/pre-commit-hooks.nix/2e4a708918e14fdbd534cc94aaa9470cd19b2464' (2022-10-02)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/f48045bb46f6eef8314b9fe01b7db9dcdbca1e10' (2022-10-01)
  → 'github:oxalica/rust-overlay/ad99d2a83db05d1c5caae4ac96f0515ba6f2b6df' (2022-10-08)