Bump respec from 35.3.1 to 35.4.0

Bumps [respec](https://github.com/speced/respec) from 35.3.1 to 35.4.0.
- [Release notes](https://github.com/speced/respec/releases)
- [Changelog](https://github.com/speced/respec/blob/main/CHANGELOG.md)
- [Commits](https://github.com/speced/respec/compare/v35.3.1...v35.4.0)

---
updated-dependencies:
- dependency-name: respec
  dependency-version: 35.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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