Bump respec from 35.1.2 to 35.2.1

Bumps [respec](https://github.com/speced/respec) from 35.1.2 to 35.2.1.
- [Release notes](https://github.com/speced/respec/releases)
- [Changelog](https://github.com/speced/respec/blob/main/CHANGELOG.md)
- [Commits](speced/respec@v35.1.2...v35.2.1)

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

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

Author: dependabot[bot]