docs: Corrected the wrong expressions of supported languages in README (#574)

* Update README.md

* Update README.md

* Update README.ja.md

* Update README.pt-BR.md

README.ja.md

@@ -2,7 +2,7 @@
 
 <div align="center">
 
-[英語](README.md) | [中国語](README.zh.md) | [ポルトガル語 (ブラジル)](README.pt-BR.md) | **日本語**
+[English](README.md) | [简体中文](README.zh.md) | [Portuguese](README.pt-BR.md) | **日本語**
 
 </div>
 

README.md

@@ -2,7 +2,7 @@
 
 <div align="center">
 
-**English** | [简体中文](README.zh.md) | [Portuguese (Brazil)](README.pt-BR.md)| [日本語](README.ja.md)
+**English** | [简体中文](README.zh.md) | [Portuguese](README.pt-BR.md) | [日本語](README.ja.md)
 
 </div>
 

README.pt-BR.md

@@ -2,7 +2,7 @@
 
 <div align="center">
 
-[Inglês](README.md) | [Chinês](README.zh.md) | **Português (Brasil)** | [Japonês](README.ja.md)
+[English](README.md) | [简体中文](README.zh.md) | **Português** | [日本語](README.ja.md)
 
 </div>