Bump @docusaurus/plugin-content-docs from 2.1.0 to 2.2.0 in /website

Bumps [@docusaurus/plugin-content-docs](https://github.com/facebook/docusaurus/tree/HEAD/packages/docusaurus-plugin-content-docs) from 2.1.0 to 2.2.0.
- [Release notes](https://github.com/facebook/docusaurus/releases)
- [Changelog](https://github.com/facebook/docusaurus/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/docusaurus/commits/v2.2.0/packages/docusaurus-plugin-content-docs)

---
updated-dependencies:
- dependency-name: "@docusaurus/plugin-content-docs"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]