Fix ESLint no-promise-executor-return error in DelayedComponent

Use block statement in Promise executor to avoid implicit return of
setTimeout's timer ID.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: AbanoubGhadban

react_on_rails_pro/spec/dummy/client/app/ror-auto-load-components/DelayedComponent.server.jsx

@@ -15,7 +15,9 @@ export default async (props, _railsContext) => {
   const { delayMs = 1000 } = props;
 
   // Simulate slow server-side data fetching
-  await new Promise((resolve) => setTimeout(resolve, delayMs));
+  await new Promise((resolve) => {
+    setTimeout(resolve, delayMs);
+  });
 
   return () => <DelayedComponent {...props} />;
 };