Updated Workflow to use Lix

.github/workflows/build.yml

@@ -7,10 +7,11 @@ jobs:
       image: ghcr.io/lix-project/lix:latest
     name: "Check NixOS Configuration"
     steps:
-      - name: "Use Node.js (Workarround)"
-        uses: actions/setup-node@v4
-        with:
-          node-version: '21.x'
+      - name: "Install Node.JS Workarround, see https://github.com/nektos/act/issues/973"
+        run: |
+          curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
+          apt install -y nodejs
+          node --version
 
       - name: "Checkout"
         uses: actions/checkout@v3