flake.lock: Update

Flake lock file updates:

• Updated input 'flake-utils':
    'github:numtide/flake-utils/7e2a3b3dfd9af950a856d66b0a7d01e3c18aa249' (2022-07-04)
  → 'github:numtide/flake-utils/c0e246b9b83f637f4681389ecabcb2681b4f3af0' (2022-08-07)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/e732e1fdbf79bec59f7ade4a3675b091b4a9f6d6' (2022-07-19)
  → 'github:NixOS/nixpkgs/490f6174c03132bf8f078d0f3a6e5890a47f9b30' (2022-08-09)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/db3bd555d3a3ceab208bed48f983ccaa6a71a25e' (2022-06-25)
  → 'github:cachix/pre-commit-hooks.nix/6a9402e8f233de16536349d1dd3f4595c23386a4' (2022-08-04)