Bump mermaid from 8.11.5 to 8.12.0

Bumps [mermaid](https://github.com/knsv/mermaid) from 8.11.5 to 8.12.0.
- [Release notes](https://github.com/knsv/mermaid/releases)
- [Changelog](https://github.com/mermaid-js/mermaid/blob/develop/docs/CHANGELOG.md)
- [Commits](mermaid-js/mermaid@8.11.5...8.12.0)

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

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