Bump flake.lock and related dependencies (#624)

* flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/314e12ba369ccdb9b352a4db26ff419f7c49fa84?narHash=sha256-5fNndbndxSx5d%2BC/D0p/VF32xDiJCJzyOqorOYW4JEo%3D' (2024-12-13)
  → 'github:NixOS/nixpkgs/1c6e20d41d6a9c1d737945962160e8571df55daa?narHash=sha256-GIMyMt1pkkoXdCq9un859bX6YQZ/iYtukb9R5luazLM%3D' (2024-12-20)

* Sync CI dependencies with nixpkgs

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

.github/workflows/ci-js.yml

@@ -38,7 +38,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: denoland/setup-deno@v2
         with:
-          deno-version: '2.1.3' # selfup {"extract":"\\d[^']+","replacer":["bash","-c","deno --version | head -n 1"], "nth": 2}
+          deno-version: '2.1.4' # selfup {"extract":"\\d[^']+","replacer":["bash","-c","deno --version | head -n 1"], "nth": 2}
       - run: deno lint
   stylelint:
     timeout-minutes: 15