Bump @storybook/html-webpack5 from 7.6.7 to 7.6.8

Bumps [@storybook/html-webpack5](https://github.com/storybookjs/storybook/tree/HEAD/code/frameworks/html-webpack5) from 7.6.7 to 7.6.8.
- [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/v7.6.8/code/frameworks/html-webpack5)

---
updated-dependencies:
- dependency-name: "@storybook/html-webpack5"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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