build(deps-dev): bump md-toc from 8.1.9 to 8.2.0

Bumps [md-toc](https://blog.franco.net.eu.org/software/#md-toc) from 8.1.9 to 8.2.0.

---
updated-dependencies:
- dependency-name: md-toc
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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