chore: update prompt

web/src/pages/Token/EditToken.js

 import React, { useEffect, useState } from 'react';
-import { Button, Form, Header, Segment } from 'semantic-ui-react';
+import { Button, Form, Header, Message, Segment } from 'semantic-ui-react';
 import { useParams } from 'react-router-dom';
 import { API, showError, showSuccess, timestamp2string } from '../../helpers';
 
@@ -106,6 +106,7 @@ const EditToken = () => {
               required={!isEdit}
             />
           </Form.Field>
+          <Message>注意，令牌的额度仅用于限制令牌本身的最大额度使用量，实际的使用受到账户的剩余额度限制。</Message>
           <Form.Field>
             <Form.Input
               label='额度'