Updating poudriere jail

[Jerry]

I currently have poudriere running on a FreeBSD 12.0-RELEASE-p11
system. I am going to use "freebsd-update" to update the system to
FreeBSD 12.1.

My question is what is the prope way to update the poudriere jail. I
was thinking I could do this:

	poudriere jails -c -j releng_12.1 -v 12.1-RELEASE

Then when I run poudriere to update my ports, I would just reference
"releng-12.1" as the jail.

Is this correct? I really do not want to hose my system. I don't have
the time to rebuild it from scratch.

-- 
Jerry