chore(deps-dev): bump @storybook/html from 6.3.12 to 6.4.9

Bumps [@storybook/html](https://github.com/storybookjs/storybook/tree/HEAD/app/html) from 6.3.12 to 6.4.9.
- [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/v6.4.9/app/html)

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

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