Bump undici from 5.28.2 to 6.0.0

Bumps [undici](https://github.com/nodejs/undici) from 5.28.2 to 6.0.0.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v5.28.2...v6.0.0)

---
updated-dependencies:
- dependency-name: undici
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -47,7 +47,7 @@
     "respec": "34.2.2",
     "respec-hljs": "2.1.1",
     "rollup": "4.6.1",
-    "undici": "^5.22.1"
+    "undici": "^6.0.0"
   },
   "overrides": {
     "puppeteer": "$puppeteer"