Bump markdown-it from 12.0.2 to 12.0.4

Bumps [markdown-it](https://github.com/markdown-it/markdown-it) from 12.0.2 to 12.0.4.
- [Release notes](https://github.com/markdown-it/markdown-it/releases)
- [Changelog](https://github.com/markdown-it/markdown-it/blob/master/CHANGELOG.md)
- [Commits](markdown-it/markdown-it@12.0.2...12.0.4)

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