add next.js version limitations

Author: Yoshify

src/content/docs/developer-tools/sdks/backend/nextjs-sdk.mdx

@@ -1488,6 +1488,8 @@ To immediately get the most up-to-date Kinde data in your session, use the `refr
 
 <Aside title="Warning" type="warning">
 
+This utility only works in Next.js 14 and above. Attempting to use it in an older version will result in a warning.
+
 Due to limitations in Next.js, refreshing data on demand can only occur from a client component.
 
 For more information, see the [Next.js docs](https://nextjs.org/docs/app/api-reference/functions/cookies#understanding-cookie-behavior-in-server-components).