Bump markdown-it from 12.0.6 to 12.1.0

Bumps [markdown-it](https://github.com/markdown-it/markdown-it) from 12.0.6 to 12.1.0.
- [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@12.0.6...12.1.0)

---
updated-dependencies:
- dependency-name: markdown-it
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -26,7 +26,7 @@
         "html-minifier": "^4.0.0",
         "http-server": "^0.12.3",
         "kuroshiro-analyzer-kuromoji": "^1.1.0",
-        "markdown-it": "^12.0.6",
+        "markdown-it": "^12.1.0",
         "replace": "^1.2.1",
         "slugify": "^1.6.0",
         "uglifyjs-folder": "^3.0.0"