There are two different repositories in the documentation.
What is the difference between official and rolling repositories?
Hi.
The official repository contains a branch of packages that are released once a month with the official version number at the time of release. For example, 21.9, as the year and month of release.
The rolling repository contains packages that include all fixes and features added to the official package during the month.
At the beginning of the month, the latest rolling package becomes the new official update. And includes all changes for the month.
The changes can be found here