build(deps-dev): bump typescript from 4.3.5 to 4.8.4 in /website

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 4.3.5 to 4.8.4.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v4.3.5...v4.8.4)

---
updated-dependencies:
- dependency-name: typescript
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]