docs: normalize readme badges

Author: afc163

README.md

@@ -14,6 +14,7 @@
 </div>
 
 <p align="center">English | <a href="./README.zh-CN.md">简体中文</a></p>
+
 ## Highlights
 
 - Works as a controlled or uncontrolled checkbox.

README.zh-CN.md

@@ -14,6 +14,7 @@
 </div>
 
 <p align="center"><a href="./README.md">English</a> | 简体中文</p>
+
 ## 特性
 
 - 可作为受控或非受控复选框。