fix: migrate action runtime to node24

GitHub Actions is deprecating the Node 20 JavaScript action runtime.
Moving this action to Node 24 avoids platform warnings and keeps
the checked-in bundle aligned with the runtime metadata.

Add a regression test so future changes do not drift the action
metadata and build target apart again.

Author: EricCrosson

action.yml

@@ -18,5 +18,5 @@ inputs:
     default: false
 
 runs:
-  using: node20
+  using: node24
   main: dist/index.js