CI: Ensure WebAssembly test exit code bubbles up

Author: lovell

.github/workflows/ci.yml

@@ -302,7 +302,7 @@ jobs:
       - name: Dependencies (Node.js)
         uses: actions/setup-node@v6
         with:
-          node-version: "20"
+          node-version: "22"
       - run: npm install
       - run: emmake npm run build
       - name: Verify emscripten versions match