fix(docs): correct invalid closing tag in custom error page sample co…

…de (#11872)

docs/pages/guides/pages/error.mdx

@@ -86,7 +86,7 @@ export default function AuthErrorPage() {
         <div className="font-normal text-gray-700 dark:text-gray-400">
           {errorMap[error] || "Please contact us if this error persists."}
         </div>
-      </div>
+      </a>
     </div>
   )
 }