build(deps): bump promptfoo from 0.91.3 to 0.94.0

Bumps [promptfoo](https://github.com/promptfoo/promptfoo) from 0.91.3 to 0.94.0.
- [Release notes](https://github.com/promptfoo/promptfoo/releases)
- [Commits](promptfoo/promptfoo@0.91.3...0.94.0)

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

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