chore: update flake (#101)

Flake lock file updates:

• Updated input 'master':
    'github:NixOS/nixpkgs/0b6f3e17dda02c9cf1e8edc6e411ba37093f09e2' (2023-08-20)
  → 'github:NixOS/nixpkgs/38b9aaf6682015f1d2fc7b7f48da96992c30cfa3' (2023-08-26)
• Updated input 'nixos-hardware':
    'github:NixOS/nixos-hardware/7f1836531b126cfcf584e7d7d71bf8758bb58969' (2023-08-18)
  → 'github:NixOS/nixos-hardware/817e297fc3352fadc15f2c5306909aa9192d7d97' (2023-08-25)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/4cdad15f34e6321a2f789b99d42815b9142ac2ba' (2023-08-19)
  → 'github:NixOS/nixpkgs/74e5bdc5478ebbe7ba5849f0d765f92757bb9dbf' (2023-08-25)
• Updated input 'nur':
    'github:nix-community/NUR/18436a20915d6cc569d7fb13807a07ae5de10661' (2023-08-19)
  → 'github:nix-community/NUR/0f81f016eecec153a26099beb25b0c8bac87bd23' (2023-08-26)
• Updated input 'unstable':
    'github:NixOS/nixpkgs/d680ded26da5cf104dd2735a51e88d2d8f487b4d' (2023-08-19)
  → 'github:NixOS/nixpkgs/5690c4271f2998c304a45c91a0aeb8fb69feaea7' (2023-08-25)

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