Update description

[MAILPOET-2937]

assets/js/src/settings/pages/basics/unsubscribe_page.tsx

@@ -1,4 +1,5 @@
 import React from 'react';
+import ReactStringReplace from 'react-string-replace';
 import { t } from 'common/functions';
 import { useSetting } from 'settings/store/hooks';
 import { Label, Inputs, PagesSelect } from 'settings/components';
@@ -11,9 +12,21 @@ export default function UnsubscribePage() {
         title={t('unsubscribeTitle')}
         description={(
           <>
-            {t('unsubscribeDescription1')}
-            <br />
-            {t('unsubscribeDescription2')}
+            {
+              ReactStringReplace(
+                t('unsubscribeDescription1'),
+                '[mailpoet_page]',
+                () => <code key="mp">[mailpoet_page]</code>
+              )
+            }
+            <br /><br />
+            {
+              ReactStringReplace(
+                t('unsubscribeDescription2'),
+                'mailpoet_unsubscribe_confirmation_page',
+                () => <code key="mpcp">mailpoet_unsubscribe_confirmation_page</code>
+              )
+            }
           </>
         )}
         htmlFor="subscription-pages-unsubscribe"