Update API client with latest OpenAPI spec

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: d954372173c227be334d8b92b3872cbd202f07a3

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ------------ | ----- | | @gitbook/api | Minor |

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