Bump markdownlint-cli2 from 0.12.0 to 0.12.1 in /doc

Bumps [markdownlint-cli2](https://github.com/DavidAnson/markdownlint-cli2) from 0.12.0 to 0.12.1.
- [Changelog](https://github.com/DavidAnson/markdownlint-cli2/blob/main/CHANGELOG.md)
- [Commits](DavidAnson/markdownlint-cli2@v0.12.0...v0.12.1)

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

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

Author: dependabot[bot]

doc/package-lock.json

@@ -5,6 +5,6 @@
     "node": ">=18.0.0"
   },
   "devDependencies": {
-    "markdownlint-cli2": "0.12.0"
+    "markdownlint-cli2": "0.12.1"
   }
 }