Hi @sam.cumming,
We delayed releasing 2.7 to new enrollments temporarily as we got some reports from customers that we wanted to investigate first. We’ll continue releasing a version with SameSite changes included in the upcoming days.
Once we complete the release, changelog and the versions available will match each other. 
Hi @mwess,
We updated our documentation to have instructions to upgrade from a version <2.6 to a version >2.6. You can reach it here.
I suggest to test this, and any similar change in general, on a test tenant before applying on production.
Have a nice day all! 