Get theme version details

curl --request GET \
  --url https://registry.wp-content.io/themes/{slug}/versions/{version} \
  --header 'X-API-KEY: <api-key>'

{
  "version": "1.0.0",
  "release_notes": "Version update",
  "download_link": "https://wp-content-staging.s3.fr-par.scw.cloud/artifacts/themes/my-theme/my-theme-1.0.0-86869156b3b9fbffd6e69fa6cf49452a.zip",
  "checksum": "86869156b3b9fbffd6e69fa6cf49452a",
  "latest": false
}