Build(deps-dev): Bump @wordpress/stylelint-config

Bumps [@wordpress/stylelint-config](https://github.com/WordPress/gutenberg/tree/HEAD/packages/stylelint-config) from 23.30.0 to 23.31.0.
- [Release notes](https://github.com/WordPress/gutenberg/releases)
- [Changelog](https://github.com/WordPress/gutenberg/blob/trunk/packages/stylelint-config/CHANGELOG.md)
- [Commits](https://github.com/WordPress/gutenberg/commits/@wordpress/stylelint-config@23.31.0/packages/stylelint-config)

---
updated-dependencies:
- dependency-name: "@wordpress/stylelint-config"
  dependency-version: 23.31.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -41,7 +41,7 @@
     "@wordpress/npm-package-json-lint-config": "5.38.0",
     "@wordpress/prettier-config": "4.38.0",
     "@wordpress/scripts": "^31.3.0",
-    "@wordpress/stylelint-config": "^23.29.0",
+    "@wordpress/stylelint-config": "^23.31.0",
     "copy-webpack-plugin": "^13.0.1",
     "eslint": "9.39.2",
     "jest": "30.2.0",