Bump undici and @elastic/transport

Bumps [undici](https://github.com/nodejs/undici) and [@elastic/transport](https://github.com/elastic/elastic-transport-js). These dependencies needed to be updated together.

Updates `undici` from 5.29.0 to 6.23.0
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v5.29.0...v6.23.0)

Updates `@elastic/transport` from 8.3.2 to 8.10.1
- [Release notes](https://github.com/elastic/elastic-transport-js/releases)
- [Commits](elastic/elastic-transport-js@v8.3.2...v8.10.1)

---
updated-dependencies:
- dependency-name: undici
  dependency-version: 6.23.0
  dependency-type: indirect
- dependency-name: "@elastic/transport"
  dependency-version: 8.10.1
  dependency-type: indirect
...

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Author: dependabot[bot]