Upgrade docusaurus and remove joi dep

[rohit-gohri]

Closes #251

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🦋 Changeset detected

Latest commit: b966837d22d849eb30265ec59807c5a9ee8fba72

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

This PR includes changesets to release 3 packages

| Name | Type | | ----------------------- | ----- | | docusaurus-plugin-redoc | Patch | | docusaurus-theme-redoc | Patch | | redocusaurus | Patch |

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Name	Status	Preview	Comments	Updated
redocusaurus	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Feb 9, 2023 at 9:17PM (UTC)

[github-actions[bot]]

This pull request is automatically built and it is testable by installing redocusaurus@v0.0.0-test-20230209211755.

For commit 7bda4da86e5c0c5260e03b6fed12147d05bec958.