Update import from @sentry/node to @sentry/react-router (#13284)

Author: jorisre

docs/platforms/javascript/guides/react-router/index.mdx

@@ -176,7 +176,7 @@ Sentry.init({
 In your `entry.server.tsx` file, export the `handleError` function:
 
 ```tsx {diff} {filename: entry.server.tsx}
-import * as Sentry from "@sentry/node";
+import * as Sentry from "@sentry/react-router";
 import { type HandleErrorFunction } from "react-router";
 
 export const handleError: HandleErrorFunction = (error, { request }) => {