The current major community release of Hibernate is 5.4 which was released as of December 2018. From a community support perspective, that is the version which the article highlights as current.
The release you see from April 2019 is a minor release of the 5.3 stream which was originally released to the community as of May 2018. The team may periodically do community releases of older major versions for a variety of reasons, but its generally a good idea not to expect or assume this to ever be an ongoing task.