We link to the old https://reactjs.org site a few times in docs, and now we need to update these with their new docs site at https://react.dev. Looking through the withastro/docs and withastro/astro repos using your code editor's search/find feature should be enough to find most of them.

The old and new docs pages are not 1:1, so you also need to find the corresponding page in the new docs so there's no information being missed out on.