chore: update token page

web/src/pages/Token/index.js

 import React from 'react';
 import React from 'react';
 import TokensTable from '../../components/TokensTable';
 import TokensTable from '../../components/TokensTable';
-import { Layout } from '@douyinfe/semi-ui';
+import { Banner, Layout } from '@douyinfe/semi-ui';
 const Token = () => (
 const Token = () => (
   <>
   <>
     <Layout>
     <Layout>
       <Layout.Header>
       <Layout.Header>
-        <h3>我的令牌</h3>
+        <Banner
+          type='warning'
+          description='令牌无法精确控制使用额度，请勿直接将令牌分发给用户。'
+        />
       </Layout.Header>
       </Layout.Header>
       <Layout.Content>
       <Layout.Content>
         <TokensTable />
         <TokensTable />