[ovirt-users] HE and Node upgrade procedures

Where can I find the documentation on the procedure to upgrade the Hosted Engine as well as the oVirt Nodes? Specifically, both the HE and Nodes are currently at 4.4.4 and I would like to upgrade to 4.4.8.3. Also, if I remember correctly, 4.4.4 was the last version to use CentOS Linux 8 and later versions switched to CentOS Stream 8. Will the upgrade procedure automatically switch over to Stream? Is there anything I need to be aware of or concerned with regarding the switch to Stream? Your help and guidance is much appreciated.