update server outdated XML

[Pawel-Panek]

The version numbers in https://update.joomla.org/core/nightlies/next_minor_list.xml and the links from https://update.joomla.org/core/nightlies/next_minor_extension.xml are no longer up to date with latest versions as published on https://developer.joomla.org/nightly-builds.html.

Please update the versioning and the package download links. Thanks.