[stzn/the-swift-programming-language-jp] Pull request review submitted: #619 mutatingに関しての説明箇所の翻訳ズレ修正

[stzn/the-swift-programming-language-jp] Pull request closed: #619 mutatingに関しての説明箇所の翻訳ズレ修正

[stzn/the-swift-programming-language-jp] Issue closed: #618 翻訳不備等の修正

[stzn/the-swift-programming-language-jp] Pull request opened: #620 docs(contributor): contributors readme action update

[stzn/the-swift-programming-language-jp] Pull request review submitted: #620 docs(contributor): contributors readme action update

[stzn/the-swift-programming-language-jp] Pull request closed: #620 docs(contributor): contributors readme action update