build(deps-dev): bump @stoplight/prism-cli from 5.8.3 to 5.12.0

Bumps [@stoplight/prism-cli](https://github.com/stoplightio/prism) from 5.8.3 to 5.12.0.
- [Release notes](https://github.com/stoplightio/prism/releases)
- [Changelog](https://github.com/stoplightio/prism/blob/master/CHANGELOG.md)
- [Commits](https://github.com/stoplightio/prism/commits/v5.12.0)

---
updated-dependencies:
- dependency-name: "@stoplight/prism-cli"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>