chore(deps): update storybook monorepo to v8.1.8

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@storybook/addon-essentials (source)	8.1.7 -> 8.1.8
@storybook/addon-links (source)	8.1.7 -> 8.1.8
@storybook/blocks (source)	8.1.7 -> 8.1.8
@storybook/manager-api (source)	8.1.7 -> 8.1.8
@storybook/test (source)	8.1.7 -> 8.1.8
@storybook/theming (source)	8.1.7 -> 8.1.8
@storybook/web-components (source)	8.1.7 -> 8.1.8
@storybook/web-components-vite (source)	8.1.7 -> 8.1.8
storybook (source)	8.1.7 -> 8.1.8

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Release Notes

storybookjs/storybook (@​storybook/addon-essentials)

### [`v8.1.8`](https://togithub.com/storybookjs/storybook/blob/HEAD/CHANGELOG.md#818) [Compare Source](https://togithub.com/storybookjs/storybook/compare/v8.1.7...v8.1.8) - Automigrations: Make VTA "learn more" link clickable - [#​28020](https://togithub.com/storybookjs/storybook/pull/28020), thanks [@​deiga](https://togithub.com/deiga)! - CLI: Fix `init --skip-install` - [#​28226](https://togithub.com/storybookjs/storybook/pull/28226), thanks [@​shilman](https://togithub.com/shilman)!

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