Release notes
https://www.freebsd.org/releases/10.2R/relnotes.html
Counter proposal to consider
Would it be valuable to switch to -STABLE instead to use -RELEASE?
Release notes important points
The default pkg(8) repository set in /etc/pkg/FreeBSD.conf now defaults to the quarterly package set. To use the latest branch (as was the previous default), the comment at the top of /etc/pkg/FreeBSD.conf explains how to disable the default repository and specify an alternative repository. [r285830] (Sponsored by The FreeBSD Foundation)
Previous upgrade