update README.md

Author: KoyanagiHitoshi

README.md

@@ -1,9 +1,10 @@
 ![](https://img.shields.io/badge/Python-3.8.2-informational.svg)
+![](https://img.shields.io/badge/Python-3.11.4-informational.svg)
 ![](https://img.shields.io/badge/pycodestyle-2.11.0-informational.svg)
 
 # AtCoder Python Introduction
 
-This repository publishes the code listed in [AtCoderで始めるPython入門](https://qiita.com/KoyanagiHitoshi/items/3286fbc65d56dd67737c).
+This repository publishes codes listed in [AtCoderで始めるPython入門](https://qiita.com/KoyanagiHitoshi/items/3286fbc65d56dd67737c).
 
 ## Clone