Update the node.js runtime to node.js 20

Thanks to @MehdiChinoune .

Per https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions#runs-for-javascript-actions

action/action.yml

@@ -76,5 +76,5 @@ inputs:
   example-modules:
     description: Space-separated list of additional example modules to install.
 runs:
-  using: node16
+  using: node20
   main: lib/main.js