Bump @storybook/addon-viewport from 5.3.21 to 8.4.6

Bumps [@storybook/addon-viewport](https://github.com/storybookjs/storybook/tree/HEAD/code/addons/viewport) from 5.3.21 to 8.4.6.
- [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/v8.4.6/code/addons/viewport)

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

Signed-off-by: dependabot[bot] <[email protected]>