fix: コピーボタンの文言を「コピーする」「コピー済み」に変更

[newt239]

概要

ドキュメントサイトのCodeBlockのコピーボタン文言を「コピー」/「コピー完了!」から「コピーする」/「コピー済み」に変更します。

依存

#91 をベースにしたPRです。#91 のマージ後にベースがmainに切り替わります。

🤖 Generated with Claude Code

[changeset-bot]

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Latest commit: 56d17a5

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