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### What?
This PR removes two links from a time where there was two distinct
live-preview examples. It also adjusts links for CORS and CSRF to a more
appropriate location in the docs.
### Why?
Now there's only the App Router example, so direct users there instead.
### How?
Changes to `docs/live-preview/client.mdx`
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The following items will ensure that your PR is handled as smoothly as
possible:
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my new feature`, `fix(plugin-seo): my fix`.
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### What?
### Why?
### How?
Fixes #
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