Bump respec from 35.3.1 to 35.4.0 (#1833)

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](speced/respec@v35.3.1...v35.4.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -43,7 +43,7 @@
     "webidl2": "24.4.1"
   },
   "devDependencies": {
-    "respec": "35.3.1",
+    "respec": "35.4.0",
     "respec-hljs": "2.1.1",
     "rollup": "4.40.2",
     "undici": "^7.0.0"