Handle server rate limit in script.js

In the 'then' function of our AJAX request in script.js, I've added a condition to check for a response status of 429 which indicates too many requests. If this status is encountered, an error message will be shown prompting the user to refresh their CAPTCHA. This is to prevent the user from making excessive attempts unbeknownst to them.

exmplate/script.js

@@ -152,7 +152,13 @@
             },
             body: JSON.stringify(data)
         })
-        .then(response => response.json())
+        .then(response => {
+            if (response.status === 429) {
+                setError('Вы превысили количество попыток. Обновите каптчу.', button);
+                return
+            }
+            return response.json();
+        })
         .then(function (data) {
             if (typeof data.errors !== 'undefined') {
                 let errorMessage = '';