updated .github/workflows

Author: johannesloetzsch

.github/workflows/deploy.yml

@@ -14,7 +14,7 @@ jobs:
     - run: nix flake check
 
     - name: Upload artifact
-      uses: actions/upload-pages-artifact@v2
+      uses: actions/upload-pages-artifact@v3
       with:
         path: ./frontend/apps/demo/out/
 
@@ -32,4 +32,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v4