chore(deps-dev): bump markdownlint-cli2 from 0.11.0 to 0.12.1 (#50)

Bumps [markdownlint-cli2](https://github.com/DavidAnson/markdownlint-cli2) from 0.11.0 to 0.12.1.
- [Changelog](https://github.com/DavidAnson/markdownlint-cli2/blob/main/CHANGELOG.md)
- [Commits](DavidAnson/markdownlint-cli2@v0.11.0...v0.12.1)

---
updated-dependencies:
- dependency-name: markdownlint-cli2
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -53,7 +53,7 @@
         "image-size": "1.0.2",
         "linkedom": "0.16.11",
         "lint-staged": "14.0.1",
-        "markdownlint-cli2": "0.11.0",
+        "markdownlint-cli2": "0.12.1",
         "markdownlint-config-fluid": "0.1.5",
         "netlify-cms-proxy-server": "1.3.24",
         "npm-run-all": "4.1.5",