chore(deps): update storybook monorepo to v8.6.8

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@storybook/addon-actions (source)	8.6.7 -> 8.6.8
@storybook/vue3 (source)	8.6.7 -> 8.6.8
@storybook/vue3-vite (source)	8.6.7 -> 8.6.8

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Release Notes

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

v8.6.8

Compare Source

• Angular: Export all files in Angular package.json - #​30849, thanks @​kasperpeulen!
• CLI: Don't add packageManager entry to package.json automatically - #​30855, thanks @​kasperpeulen!
• React: Allow portable stories to be used in SSR - #​30847, thanks @​kasperpeulen!
• Svelte: Adjust Svelte typings to include Svelte 5 function components - #​30852, thanks @​dummdidumm!
• Telemetry: Make sure that telemetry doesn't fail on init - #​30857, thanks @​kasperpeulen!
• Vite: Update HMR filter to target specific story file types - #​30845, thanks @​kasperpeulen!

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