chore(deps): bump @notionhq/client from 5.16.0 to 5.20.0

Bumps [@notionhq/client](https://github.com/makenotion/notion-sdk-js) from 5.16.0 to 5.20.0.
- [Release notes](https://github.com/makenotion/notion-sdk-js/releases)
- [Commits](makenotion/notion-sdk-js@v5.16.0...v5.20.0)

---
updated-dependencies:
- dependency-name: "@notionhq/client"
  dependency-version: 5.19.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]