flake.lock: Update (#4072)

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 'gitignore':
    'github:hercules-ci/gitignore.nix/f2ea0f8ff1bce948ccb6b893d15d5ea3efaf1364' (2022-07-21)
  → 'github:hercules-ci/gitignore.nix/a20de23b925fd8264fd7fad6454652e142fd7f73' (2022-08-14)
• Updated input 'naersk':
    'github:nix-community/naersk/cddffb5aa211f50c4b8750adbec0bbbdfb26bb9f' (2022-06-12)
  → 'github:nix-community/naersk/c6a45e4277fa58abd524681466d3450f896dc094' (2022-08-04)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/2d372784634e224c5a629d80a19705af655fbc7d' (2022-07-22)
  → 'github:NixOS/nixpkgs/495b19d5b3e62b4ec7e846bdfb6ef3d9c3b83492' (2022-08-19)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/f436e6dbc10bb3500775785072a40eefe057b18e' (2022-07-23)
  → 'github:cachix/pre-commit-hooks.nix/8cb8ea5f1c7bc2984f460587fddd5f2e558f6eb8' (2022-08-18)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/4bd340885e39e0625fc6dda8a5a9d13c921ebb96' (2022-07-23)
  → 'github:oxalica/rust-overlay/33aaf88ac9f5f7115eca96e784e96e519c670b18' (2022-08-20)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>