fix readme 2

readme-en.md

@@ -1,7 +1,7 @@
 [(en-US)](./readme-en.md) | [(ko-KR)](./readme.md)
 
 # openNAMU
-[![Up to Python 3.6](https://img.shields.io/badge/python->=%203.5-blue.svg)](https://python.org)
+[![Up to Python 3.6](https://img.shields.io/badge/python->=%203.6-blue.svg)](https://python.org)
 [![LICENSE](https://img.shields.io/badge/license-BSD%203--Clause-lightgrey.svg)](./LICENSE)
 
 ![](https://raw.githubusercontent.com/openNAMU/openNAMU/beta/.github/logo.png)

readme.md

@@ -1,7 +1,7 @@
 [(en-US)](./readme-en.md) | [(ko-KR)](./readme.md)
 
 # 오픈나무
-[![Python 3.6 이상](https://img.shields.io/badge/python->=%203.5-blue.svg)](https://python.org)
+[![Python 3.6 이상](https://img.shields.io/badge/python->=%203.6-blue.svg)](https://python.org)
 [![라이선스](https://img.shields.io/badge/license-BSD%203--Clause-lightgrey.svg)](./LICENSE)
 
 ![](https://raw.githubusercontent.com/openNAMU/openNAMU/beta/.github/logo.png)