build(deps-dev): bump stylelint from 16.18.0 to 16.21.0

Bumps [stylelint](https://github.com/stylelint/stylelint) from 16.18.0 to 16.21.0.
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/main/CHANGELOG.md)
- [Commits](https://github.com/stylelint/stylelint/compare/16.18.0...16.21.0)

---
updated-dependencies:
- dependency-name: stylelint
  dependency-version: 16.21.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -85,7 +85,7 @@
     "redux-mock-store": "1.5.5",
     "sass": "1.88.0",
     "sass-loader": "16.0.5",
-    "stylelint": "16.18.0",
+    "stylelint": "16.21.0",
     "stylelint-config-recommended-scss": "15.0.1",
     "ts-node": "10.9.2",
     "ts-patch": "3.3.0",