Update to download-artifact@v4

Signed-off-by: Marc Duiker <marcduiker@users.noreply.github.com>

Author: marcduiker

.github/workflows/website-root.yml

@@ -90,7 +90,7 @@ jobs:
         with:
           submodules: false
       - name: Download Hugo artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: hugo_build
           path: site/