fix: cast title meta as string in CldOgImage

[huang-julien]

resolve #177

Types of changes

• [x] Bug fix (a non-breaking change which fixes an issue)
• [ ] New feature (a non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Description

Hi :wave: This PR fix CldOgImage types for vue-tsc. Since route.meta.title is unknown, ts will assume that computedTwitterTitle is ComputedRef<{}> instead of ComputedRef<string>

Checklist:

• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes (if not applicable, please state why)

[netlify[bot]]

‼️ Deploy request for nuxt-cloudinary-module rejected.

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