Update node to 20 in build_and_staging.yml

Signed-off-by: Kurt Garloff <kurt@garloff.de>

Author: garloff

.github/workflows/build_and_staging.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version: 20
 
       - name: Cache dependencies
         uses: actions/cache@v3