Update flake.lock (#368)

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

```
Flake lock file updates:

• Updated input 'flake-utils':
    'github:numtide/flake-utils/c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a?narHash=sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ%3D' (2024-09-17)
  → 'github:numtide/flake-utils/11707dc2f618dd54ca8739b309ec4fc024de578b?narHash=sha256-l0KFg5HjrsfsO/JpG%2Br7fRrqm12kzFHyUHqHCVpMMbI%3D' (2024-11-13)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/807e9154dcb16384b1b765ebe9cd2bba2ac287fd?narHash=sha256-l253w0XMT8nWHGXuXqyiIC/bMvh1VRszGXgdpQlfhvU%3D' (2024-10-29)
  → 'github:nixos/nixpkgs/88195a94f390381c6afcdaa933c2f6ff93959cb4?narHash=sha256-0q9NGQySwDQc7RhAV2ukfnu7Gxa5/ybJ2ANT8DQrQrs%3D' (2024-12-29)
```

### Running GitHub Actions on this PR

GitHub Actions will not run workflows on pull requests which are opened
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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