update CHANGELOG.md

Author: KoyanagiHitoshi

CHANGELOG.md

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 # Change Log
 
+## [v3.11.0](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/releases/tag/v3.11.0) / 2023-11-05
+
+* [#32](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/pull/32) add code
+* [#32](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/pull/32) update CHANGELOG.md
+
 ## [v3.10.0](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/releases/tag/v3.10.0) / 2023-10-22
 
 * [#31](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/pull/31) upgrade pycodestyle 2.11.0 => 2.11.1
 * [#31](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/pull/31) update README.md
-* [#31](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/pull/13) update CHANGELOG.md
+* [#31](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/pull/31) update CHANGELOG.md
 
 ## [v3.9.0](https://github.com/KoyanagiHitoshi/AtCoder-Python-Introduction/releases/tag/v3.9.0) / 2023-10-01