build(deps): Bump rehype-katex from 6.0.3 to 7.0.0 in /api-editor/gui

Bumps [rehype-katex](https://github.com/remarkjs/remark-math) from 6.0.3 to 7.0.0.
- [Release notes](https://github.com/remarkjs/remark-math/releases)
- [Commits](https://github.com/remarkjs/remark-math/compare/rehype-katex@6.0.3...rehype-katex@7.0.0)

---
updated-dependencies:
- dependency-name: rehype-katex
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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