chore(deps-dev): bump @storybook/addon-docs in /frontend

Bumps [@storybook/addon-docs](https://github.com/storybookjs/storybook/tree/HEAD/code/addons/docs) from 10.6.5 to 10.6.6.
- [Release notes](https://github.com/storybookjs/storybook/releases)
- [Changelog](https://github.com/storybookjs/storybook/blob/next/CHANGELOG.md)
- [Commits](https://github.com/storybookjs/storybook/commits/v10.6.6/code/addons/docs)

---
updated-dependencies:
- dependency-name: "@storybook/addon-docs"
  dependency-version: 10.6.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

frontend/package.json

@@ -59,7 +59,7 @@
   },
   "devDependencies": {
     "@storybook/addon-a11y": "^10.6.5",
-    "@storybook/addon-docs": "^10.6.5",
+    "@storybook/addon-docs": "^10.6.6",
     "@storybook/addon-vitest": "^10.6.5",
     "@storybook/react-vite": "^10.6.5",
     "@testing-library/dom": "^10.4.2",