update README.md.

README.md

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   <img alt="logo" src="https://images.gitee.com/uploads/images/2021/0120/114533_b7f16f5b_1674451.png" width="120" style="margin-bottom: 0px;">
 </p>
 <h2 align="center">Tduck 填鸭 —— 让每个企业都有自己的表单收集系统</h2>
+<p align="center">![](https://img.shields.io/:license-apache-blue.svg) ![](https://img.shields.io/badge/JDK-1.8+-green.svg) ![](https://img.shields.io/badge/BY-SpringBoot-green)</p>
 
-![](https://img.shields.io/:license-apache-blue.svg) ![](https://img.shields.io/badge/JDK-1.8+-green.svg) ![]
 
 ## 平台简介