Fix português (brasil) README.md path (#411)

* Fix readme.md ptbr path

* Fix readme.md ptbr path

README.md

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

README.zh.md

@@ -2,7 +2,7 @@
 
 <div align="center">
 
-[English](README.md) | **中文简体** | [Português (Brasil)](README.pt-BR)
+[English](README.md) | **中文简体** | [Português (Brasil)](README.pt-BR.md)
 
 </div>