Prose tweak

Author: kylegach

docs/api/portable-stories/portable-stories-vitest.mdx

@@ -28,7 +28,7 @@ sidebar:
 
   <If renderer="react">
     <Callout variant="warning">
-      **Using `Next.js`?** Next.js support for Vitest is now possible by using the [vite-plugin-storybook-nextjs](https://github.com/storybookjs/vite-plugin-storybook-nextjs) Plugin. Please make sure that the plugin is installed and set up.
+      **Using `Next.js`?** You can test your Next.js stories with Vitest by installing and setting up the [`vite-plugin-storybook-nextjs`](https://github.com/storybookjs/vite-plugin-storybook-nextjs) package. 
     </Callout>
   </If>