flake.lock: Update (#1527)

Flake lock file updates:

• Updated input 'crane':
    'github:ipetkov/crane/1a551ae11bff91521cbeaebb8ca59a101c9f33f8' (2023-08-03)
  → 'github:ipetkov/crane/7809d369710abb17767b624f9e72b500373580bc' (2023-08-12)
• Updated input 'crane/rust-overlay':
    'github:oxalica/rust-overlay/99df4908445be37ddb2d332580365fce512a7dcf' (2023-08-03)
  → 'github:oxalica/rust-overlay/b520a3889b24aaf909e287d19d406862ced9ffc9' (2023-08-07)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/18036c0be90f4e308ae3ebcab0e14aae0336fe42' (2023-08-04)
  → 'github:NixOS/nixpkgs/d680ded26da5cf104dd2735a51e88d2d8f487b4d' (2023-08-19)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/3139c4d1f7732cab89f06492bdd4677b877e3785' (2023-08-05)
  → 'github:cachix/pre-commit-hooks.nix/7e3517c03d46159fdbf8c0e5c97f82d5d4b0c8fa' (2023-08-17)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/18ee2a71de24273e4ad4503b5604532f0b53f382' (2023-08-05)
  → 'github:oxalica/rust-overlay/598b2f04ed252eb5808b108d7a10084c0c548753' (2023-08-19)

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