Bump ansi-html and gatsby in /client

Removes [ansi-html](https://github.com/Tjatse/ansi-html). It's no longer used after updating ancestor dependency [gatsby](https://github.com/gatsbyjs/gatsby). These dependencies need to be updated together.


Removes `ansi-html`

Updates `gatsby` from 3.14.6 to 5.2.0
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/compare/[email protected]@5.2.0)

---
updated-dependencies:
- dependency-name: ansi-html
  dependency-type: indirect
- dependency-name: gatsby
  dependency-type: direct:development
...

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