Update copy-button.ts

[steve02081504]

fix this:

[changeset-bot]

⚠️ No Changeset found

Latest commit: 5b5a9f4

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[pkg-pr-new]

npm i https://pkg.pr.new/rehype-pretty-code@261

npm i https://pkg.pr.new/@rehype-pretty/transformers@261

commit: 5b5a9f4