flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/9e7f26f82acb057498335362905fde6fea4ca50a?narHash=sha256-VnG0Eu394Ga2FCe8Q66m6OEQF8iAqjDYsjmtl%2BN2omk%3D' (2024-04-06)
  → 'github:nixos/nixpkgs/81610abc161d4021b29199aa464d6a1a521e0cc9?narHash=sha256-TcXjLVNd3VeH1qKPH335Tc4RbFDbZQX%2Bd7rqnDUoRaY%3D' (2024-08-02)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/e35aed5fda3cc79f88ed7f1795021e559582093a?narHash=sha256-4XLvuSIDZJGS17xEwSrNuJLL7UjDYKGJSbK1WWX2AK8%3D' (2024-04-02)
  → 'github:cachix/pre-commit-hooks.nix/f451c19376071a90d8c58ab1a953c6e9840527fd?narHash=sha256-6FPUl7HVtvRHCCBQne7Ylp4p%2BdpP3P/OYuzjztZ4s70%3D' (2024-07-15)
• Removed input 'pre-commit-hooks/flake-utils'
• Removed input 'pre-commit-hooks/flake-utils/systems'
• Updated input 'pre-commit-hooks/nixpkgs-stable':
    'github:NixOS/nixpkgs/614b4613980a522ba49f0d194531beddbb7220d3?narHash=sha256-3Eh7fhEID17pv9ZxrPwCLfqXnYP006RKzSs0JptsN84%3D' (2024-03-17)
  → 'github:NixOS/nixpkgs/194846768975b7ad2c4988bdb82572c00222c0d7?narHash=sha256-NGKVY4PjzwAa4upkGtAMz1npHGoRzWotlSnVlqI40mo%3D' (2024-07-07)