5.12 to 5.13 - I would not consider that significant. The FreeBSD paxkage of the Unifi controller has not been updated since mid May, so you cannot simply
pkg upgrade
. You would need to download the Linux package from Ubnt, unpack the .deb and then find the .jar or .war file in there and manually place it into the tomcat installation that probably still drives the Unifi controller.
I would at least wait for an update to the FreeBSD port and only when the plugin does not follow suit, ping the maintainer or use
pkg upgrade
as mentioned.
www.freshports.org helps you check for new versions of FreeBSD packages.