Update: fix typo in 02-nextjs-app-router.mdx (#1547)

content/docs/02-getting-started/02-nextjs-app-router.mdx

@@ -98,7 +98,7 @@ Let's take a look at what is happening in this code:
 3. The `streamText` function will return a [`StreamTextResult`](/docs/reference/ai-sdk-core/stream-text#result-object). This result object contains the [ `toAIStream` ](/docs/reference/ai-sdk-core/stream-text#to-ai-stream) function which will be used in the next step to convert the stream into a format compatible with `StreamingTextResponse`.
 4. Finally, you send the result to the client by returning a new [`StreamingTextResponse`](/docs/reference/stream-helpers/streaming-text-response), passing the AI Stream from the `result` object described in the previous step. This will set the required headers and response details to allow the client to stream the response.
 
-This Route Handler creates a POST request endpint at `/api/chat`.
+This Route Handler creates a POST request endpoint at `/api/chat`.
 
 ## Wire up the UI