chore(deps-dev): bump eslint-plugin-mdx from 1.13.0 to 1.15.0 in /docs

Bumps [eslint-plugin-mdx](https://github.com/mdx-js/eslint-mdx) from 1.13.0 to 1.15.0.
- [Release notes](https://github.com/mdx-js/eslint-mdx/releases)
- [Changelog](https://github.com/mdx-js/eslint-mdx/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mdx-js/eslint-mdx/compare/v1.13.0...v1.15.0)

---
updated-dependencies:
- dependency-name: eslint-plugin-mdx
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

docs/package.json

@@ -44,7 +44,7 @@
   "devDependencies": {
     "eslint": "^7.32.0",
     "eslint-config-prettier": "^8.3.0",
-    "eslint-plugin-mdx": "^1.13.0",
+    "eslint-plugin-mdx": "^1.15.0",
     "eslint-plugin-react": "^7.23.2",
     "json-schema-to-typescript": "^10.1.3",
     "mustache": "^4.2.0",