build(deps): bump undici from 6.14.1 to 6.19.2 in /src/website

Bumps [undici](https://github.com/nodejs/undici) from 6.14.1 to 6.19.2.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v6.14.1...v6.19.2)

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

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