Upgrade: [dependabot] - bump artillery from 2.0.30 to 2.0.31

Bumps [artillery](https://github.com/artilleryio/artillery) from 2.0.30 to 2.0.31.
- [Release notes](https://github.com/artilleryio/artillery/releases)
- [Commits](https://github.com/artilleryio/artillery/commits)

---
updated-dependencies:
- dependency-name: artillery
  dependency-version: 2.0.31
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]