Bump markdownlint-cli2 from 0.4.0 to 0.6.0

Bumps [markdownlint-cli2](https://github.com/DavidAnson/markdownlint-cli2) from 0.4.0 to 0.6.0.
- [Release notes](https://github.com/DavidAnson/markdownlint-cli2/releases)
- [Commits](DavidAnson/markdownlint-cli2@v0.4.0...v0.6.0)

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

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

Author: dependabot[bot]

package-lock.json

@@ -55,7 +55,7 @@
     "instant.page": "^5.1",
     "katex": "^0.16",
     "lazysizes": "^5.3",
-    "markdownlint-cli2": "^0.4.0",
+    "markdownlint-cli2": "^0.6.0",
     "netlify-plugin-submit-sitemap": "^0.4.0",
     "node-fetch": "^3.2",
     "postcss": "^8.4",