docs: mention turbopack and fix file extension

[notrab]

For those using Next.js 16 and above, Turbopack is the default which has the same URL() syntax as Webpack.

Also, the link to the Next.js example page.ts was wrong. This renames that file to use .tsx instead.

[changeset-bot]

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[dimaMachina]

Also, the link to the Next.js example page.ts was wrong. This renames that file to use .tsx instead.

yep, link was wrong, but we don't need tsx extension since there is no jsx tags in this file, pushed fixes in your PR, LGTM