docs: add info about Link prefetch option

[Darrefull]

What is it?

• Feature / enhancement
• Bug
• Docs / tests / types / typos
• Infra

Description

Add info about Link prefetching, which may result with too many requests.

IMO. Link prefetch behaviour should be by default use 'js' and hover/onload should be option on production.

Checklist:

• My code follows the developer guidelines of this project
• I have performed a self-review of my own code
• I have ran pnpm change and documented my changes
• I have made corresponding changes to the Qwik docs
• Added new tests to cover the fix / functionality

[changeset-bot]

⚠️ No Changeset found

Latest commit: fdcf9d1

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[maiieul]

Thanks @Darrefull 🫶