chore(deps): update nix flake.lock (#41)

Automated changes by the
[update-flake-lock](https://github.com/DeterminateSystems/update-flake-lock)
GitHub Action.

```
Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/08dacfca559e1d7da38f3cf05f1f45ee9bfd213c?narHash=sha256-o9KF3DJL7g7iYMZq9SWgfS1BFlNbsm6xplRjVlOCkXI%3D' (2025-10-28)
  → 'github:NixOS/nixpkgs/2d293cbfa5a793b4c50d17c05ef9e385b90edf6c?narHash=sha256-pp3uT4hHijIC8JUK5MEqeAWmParJrgBVzHLNfJDZxg4%3D' (2025-11-30)
```

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