flake.lock: Update (#343)

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/807e9154dcb16384b1b765ebe9cd2bba2ac287fd?narHash=sha256-l253w0XMT8nWHGXuXqyiIC/bMvh1VRszGXgdpQlfhvU%3D' (2024-10-29)
  → 'github:nixos/nixpkgs/76612b17c0ce71689921ca12d9ffdc9c23ce40b2?narHash=sha256-IigrKK3vYRpUu%2BHEjPL/phrfh7Ox881er1UEsZvw9Q4%3D' (2024-11-09)
```

### Running GitHub Actions on this PR

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by a GitHub Action.

To run GitHub Actions workflows on this PR, run:

```sh
git branch -D update_flake_lock_action
git fetch origin
git checkout update_flake_lock_action
git commit --amend --no-edit
git push origin update_flake_lock_action --force
```

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