fix: suggested change

example/storybook-nativewind/src/home/getting-started/Installation/index.nw.stories.mdx

@@ -246,7 +246,7 @@ export default function App() {
 
 ### Step 4: Update Next config file. (Next.js Only).
 
-Make sure your `next.config.mjs` file look like this, as mentioned below.
+Make sure your `next.config` file look like this, as mentioned below.
 
 ```jsx
 import { withGluestackUI } from "@gluestack/ui-next-adapter";