deps: bump undici from 6.14.1 to 6.15.0 (#439)

Bumps [undici](https://github.com/nodejs/undici) from 6.14.1 to 6.15.0.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v6.14.1...v6.15.0)

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

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