build(deps-dev): bump markdownlint-cli2 from 0.19.0 to 0.20.0

Bumps [markdownlint-cli2](https://github.com/DavidAnson/markdownlint-cli2) from 0.19.0 to 0.20.0.
- [Changelog](https://github.com/DavidAnson/markdownlint-cli2/blob/main/CHANGELOG.md)
- [Commits](DavidAnson/markdownlint-cli2@v0.19.0...v0.20.0)

---
updated-dependencies:
- dependency-name: markdownlint-cli2
  dependency-version: 0.20.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -14,7 +14,7 @@
     "@semantic-release/github": "^12.0.2",
     "@types/node": "24.10.1",
     "markdownlint-cli": "^0.47.0",
-    "markdownlint-cli2": "^0.19.0",
+    "markdownlint-cli2": "^0.20.0",
     "typescript": "5.9.3"
   }
 }