Bump markdownlint-cli2 from 0.14.0 to 0.15.0 in /doc

Bumps [markdownlint-cli2](https://github.com/DavidAnson/markdownlint-cli2) from 0.14.0 to 0.15.0.
- [Changelog](https://github.com/DavidAnson/markdownlint-cli2/blob/main/CHANGELOG.md)
- [Commits](DavidAnson/markdownlint-cli2@v0.14.0...v0.15.0)

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

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

doc/package.json

@@ -5,7 +5,7 @@
     "node": ">=20.0.0"
   },
   "devDependencies": {
-    "markdownlint-cli2": "0.14.0"
+    "markdownlint-cli2": "0.15.0"
   },
   "scripts": {
     "build": "npx markdownlint-cli2"