Bump undici from 5.28.2 to 6.2.1

Bumps [undici](https://github.com/nodejs/undici) from 5.28.2 to 6.2.1.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v5.28.2...v6.2.1)

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

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

package.json

@@ -48,7 +48,7 @@
   },
   "dependencies": {
     "octokit": "^3.0.0",
-    "undici": "^5.14.0",
+    "undici": "^6.2.1",
     "webassert": "^3.0.2"
   },
   "funding": {