fix: api doc duplicate symbols (#2853)

web/app/components/develop/template/template.zh.mdx

@@ -153,8 +153,6 @@ import { Row, Col, Properties, Property, Heading, SubProperty } from '../md.tsx'
         "user": "abc-123"
     }'
     ```
-    ```
-
     </CodeGroup>
     ### blocking
     <CodeGroup title="Response">