Small documentation fix

It's nothing major, but it had me confused. In step 3 it's probably better to use the following code:

```
<%- paginate(posts) %>
```

(The <%- in EJS is not very well documented and it took me too long to figure that one out)

找到 issue 中引用的文档文件（可能是 README 或指南）。定位到第 3 步，将分页代码片段替换为 `<%- paginate(posts) %>`。通过在浏览器或预览工具中检查渲染后的输出来验证更改，确保 EJS 标签正常工作。

由索引模型根据 Issue 内容生成。