chore(deps-dev): bump artillery from 2.0.14 to 2.0.15

Bumps [artillery](https://github.com/artilleryio/artillery) from 2.0.14 to 2.0.15.
- [Release notes](https://github.com/artilleryio/artillery/releases)
- [Commits](artilleryio/artillery@artillery-2.0.14...artillery-2.0.15)

---
updated-dependencies:
- dependency-name: artillery
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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