fix(docs): type useCanonical link array as unhead Link[]

[danielroe]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

uncovered this in ecosystem ci - it's a tightening in an upcoming @unhead/vue release (3.1.8, which will be dependency of Nuxt v4.5)

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 7ac08d1b-d976-49aa-80c6-11faf23e28b1

📥 Commits

Reviewing files that changed from the base of the PR and between 0a1803d and 75996e0.

📒 Files selected for processing (1)

• docs/app/composables/useCanonical.ts

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📝 Walkthrough

Walkthrough

The useCanonical composable now imports Unhead’s public Link type and uses Link[] for its computed canonical and alternate link list. Runtime link construction remains unchanged.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately reflects the main change: typing useCanonical links with Unhead's Link[] in docs.
Description check	✅ Passed	The description is clearly related to the change and explains the ecosystem CI issue and upcoming @unhead/vue tightening.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/ui-canonical-unhead

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[pkg-pr-new]

npm i https://pkg.pr.new/@nuxt/ui@6748

commit: 75996e0