Suggestion: Allow `Ref<string>` for storyblok url in `useAsyncStoryblok`

[TheAlexLichter]

Description

Hey 👋🏻

Right now, useAsyncStoryblok is not capable of taking a reactive reference (ref) but only normal strings. As most composables allow using reactive values and deal with them - say e.g. the route/url updates, then the composable refetches. I think it'd be a great addition for the StoryblokSDK

Suggested solution or improvement

Allow refs to be passed and let the composable handle changes by watching and (re-)fetching the content.

Additional context

No response

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