bump @nextcloud/stylelint-config from 2.3.0 to 2.3.1

---
updated-dependencies:
- dependency-name: "@nextcloud/stylelint-config"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package.json

@@ -81,7 +81,7 @@
     "@nextcloud/babel-config": "^1.0.0",
     "@nextcloud/browserslist-config": "^2.3.0",
     "@nextcloud/eslint-config": "^8.2.1",
-    "@nextcloud/stylelint-config": "^2.3.0",
+    "@nextcloud/stylelint-config": "^2.3.1",
     "@nextcloud/webpack-vue-config": "^5.5.1",
     "copy-webpack-plugin": "^11.0.0",
     "@nextcloud/cypress": "^1.0.0-beta.2",