clarify `svelte:component` migration, avoids common gotcha#543

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rgon wants to merge 2 commits intosveltejs:mainfrom rgon:main

Commits on Oct 22, 2024

docs: alert user of possible confusion when migrating svelte:component to 5 syntax, as seen in sveltejs/svelte/issues/13795
Gonzalo Ruiz
committed
docs: use new dynamic component syntax in migration guide
Gonzalo Ruiz
committed