Bump markdownlint-cli2 from 0.11.0 to 0.12.1

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] <support@github.com>

package.json

@@ -56,7 +56,7 @@
     "instant.page": "^5.2",
     "katex": "^0.16",
     "lazysizes": "^5.3",
-    "markdownlint-cli2": "^0.11.0",
+    "markdownlint-cli2": "^0.12.1",
     "netlify-plugin-submit-sitemap": "^0.4.0",
     "postcss": "^8.4",
     "postcss-cli": "^11.0",