flake.lock: Update

Flake lock file updates:

• Updated input 'typelevel-nix':
    'github:typelevel/typelevel-nix/6cda5f8464645f7a604b677ce0b1e01b5b2d0321' (2023-07-14)
  → 'github:typelevel/typelevel-nix/ed9f189d304aa85cb74c052d063dfc11023b4f33' (2023-08-21)
• Updated input 'typelevel-nix/devshell':
    'github:numtide/devshell/f9238ec3d75cefbb2b42a44948c4e8fb1ae9a205' (2023-07-03)
  → 'github:numtide/devshell/d208c58e2f7afef838add5f18a9936b12a71d695' (2023-08-20)
• Updated input 'typelevel-nix/flake-utils':
    'github:numtide/flake-utils/dbabf0ca0c0c4bce6ea5eaf65af5cb694d2082c7' (2023-06-25)
  → 'github:numtide/flake-utils/919d646de7be200f3bf08cb76ae1f09402b6f9b4' (2023-07-11)
• Updated input 'typelevel-nix/nixpkgs':
    'github:nixos/nixpkgs/2b356dae6208d422236c4cdc48f3bed749f9daea' (2023-07-09)
  → 'github:nixos/nixpkgs/3476a10478587dec90acb14ec6bde0966c545cc0' (2023-08-20)