[stzn/the-swift-programming-language-jp] Pull request closed: #398 原文の文言の修正の反映

[stzn/the-swift-programming-language-jp] Issue closed: #396 原文の文言の修正の反映

[stzn/the-swift-programming-language-jp] Pull request opened: #399 contributors readme action update

[stzn/the-swift-programming-language-jp] Pull request review submitted: #399 contributors readme action update

[stzn/the-swift-programming-language-jp] Pull request closed: #399 contributors readme action update