Bump stylelint from 16.2.0 to 16.2.1 in /frontend

Bumps [stylelint](https://github.com/stylelint/stylelint) from 16.2.0 to 16.2.1.
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/main/CHANGELOG.md)
- [Commits](stylelint/stylelint@16.2.0...16.2.1)

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

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

frontend/package.json

@@ -126,7 +126,7 @@
     "remark-preset-lint-markdown-style-guide": "^5.1.3",
     "remark-preset-lint-recommended": "^6.1.3",
     "storybook": "^7.6.10",
-    "stylelint": "^16.2.0",
+    "stylelint": "^16.2.1",
     "stylelint-config-css-modules": "^4.4.0",
     "stylelint-config-recess-order": "^4.4.0",
     "stylelint-config-recommended-vue": "^1.5.0",