Quarterly branch ports question

Hello all,

I maintain a FreeBSD 13 server that acts as an MTA on an
internal network. It rums Exim, and is configured to update
from the URL "pkg+http://pkg.FreeBSD.org/${ABI}/quarterly".

Today pkg upgrade installed version exim-4.97.1_5. I do not
recall that version being available last week, so I assume this
is a security release?

How can I find the changes introduced since version
exim-4.97.1_4, which is what the server was at until the
upgrade?

In particular I'm curious to know if this version addresses
CVE-2024-39929 (https://bugs.exim.org/show_bug.cgi?id=3099) by any
chance. This is just an exercise in curiosity, and a chance to learn
more about FreeBSD ports and packages.

Thanks!Pat