Fixed wrong highlight in Building your application > authentication >…

… useFormStatus hook example (#65400)

Wrong line highlight for useFormStatus example in authentication module

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Co-authored-by: samcx <sam@vercel.com>

docs/02-app/01-building-your-application/09-authentication/index.mdx

@@ -290,7 +290,7 @@ export function SignupForm() {
 
 You can also use the `useFormStatus()` hook to handle the pending state on form submission:
 
-```tsx filename="app/ui/signup-form.tsx" highlight={7} switcher
+```tsx filename="app/ui/signup-form.tsx" highlight={6} switcher
 'use client'
 
 import { useFormStatus, useFormState } from 'react-dom'
@@ -306,7 +306,7 @@ export function SignupButton() {
 }
 ```
 
-```jsx filename="app/ui/signup-form.js"  highlight={7} switcher
+```jsx filename="app/ui/signup-form.js"  highlight={6} switcher
 'use client'
 
 import { useFormStatus, useFormState } from 'react-dom'