update

Author: KoyanagiHitoshi

CHANGELOG.md

@@ -1,6 +1,12 @@
 # Change Log
 
-## v1.0.0 / 2021-03-22
+## [v1.1.0](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/releases/tag/v1.1.0) / 2021-04-04
+
+* [#1](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/pull/1) update CHANGELOG.md
+* [#1](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/pull/1) update README.md
+* [#1](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/pull/1) add code
+
+## [v1.0.0](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/releases/tag/v1.0.0) / 2021-03-22
 
 * first commit code/
 * first commit CHANGELOG.md