Bump undici in /samples/ServerlessChatWithAuth/v4-model (#324)

Bumps [undici](https://github.com/nodejs/undici) from 5.28.5 to 5.29.0.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v5.28.5...v5.29.0)

---
updated-dependencies:
- dependency-name: undici
  dependency-version: 5.29.0
  dependency-type: indirect
...

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

Author: dependabot[bot]