build(deps): bump undici from 8.11.2 to 8.12.1

Bumps [undici](https://github.com/nodejs/undici) from 8.11.2 to 8.12.1.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v8.11.2...v8.12.1)

---
updated-dependencies:
- dependency-name: undici
  dependency-version: 8.12.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]