v1.20.1: DevLink export integration and JSX extension default

v1.20.1 is a patch release with two improvements.

The webflow cloud init command now scaffolds projects using the new webflow devlink export command. The Astro and Next.js scaffold templates have been updated to take advantage of the latest DevLink features.

Legacy DevLink projects that still used the deprecated sync workflow defaulted to a .jsx extension instead of .js. Prefer webflow devlink export; see Migrating to DevLink Export.