Fix missing parens in requireAuth() (#1713)

docs/upgrade-guides/node-to-express.mdx

@@ -70,7 +70,7 @@ app.listen(port, () => {
 
 ## `requireAuth()` usage changes
 
-In the Node SDK, `requireAuth()` wrapped route handlers. With the Express SDK, you must instead pass `requireAuth)` as a middleware function before your handler instead of wrapping your handler. Additionally, `requireAuth()` will now redirect un-authenticated users to the sign in page, where previously it would emit an error.
+In the Node SDK, `requireAuth()` wrapped route handlers. With the Express SDK, you must instead pass `requireAuth()` as a middleware function before your handler instead of wrapping your handler. Additionally, `requireAuth()` will now redirect un-authenticated users to the sign in page, where previously it would emit an error.
 
 ```ts {{ del: [1, 4], ins: [2, 5] }}
 import { requireAuth } from '@clerk/clerk-sdk-node'