Bump undici from 6.13.0 to 6.18.2

Bumps [undici](https://github.com/nodejs/undici) from 6.13.0 to 6.18.2.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v6.13.0...v6.18.2)

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

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