chore(deps-dev): bump @storybook/addon-essentials from 6.3.3 to 6.4.8

Bumps [@storybook/addon-essentials](https://github.com/storybookjs/storybook/tree/HEAD/addons/essentials) from 6.3.3 to 6.4.8.
- [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/v6.4.8/addons/essentials)

---
updated-dependencies:
- dependency-name: "@storybook/addon-essentials"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

packages/design-system/package.json

@@ -27,7 +27,7 @@
   "devDependencies": {
     "@icons/material": "^0.4.1",
     "@storybook/addon-actions": "^6.3.3",
-    "@storybook/addon-essentials": "^6.3.3",
+    "@storybook/addon-essentials": "^6.4.8",
     "@storybook/addon-links": "^6.3.3",
     "@storybook/addons": "^6.3.3",
     "@storybook/react": "^6.3.3",