Bug#1076097: DeprecationWarning: This process (pid=3710789) is multi-threaded, use of fork() may lead to deadlocks in the child.

[David Mandelberg]

Package: unattended-upgrades
Version: 2.11

After a recent upgrade of python3 from 3.11.8-1 to 3.12.2-1, 
unattended-upgrade gives these warnings:

/usr/bin/unattended-upgrade:769: DeprecationWarning: This process 
(pid=3710789) is multi-threaded, use of fork() may lead to deadlocks in 
the child.
  pid = os.fork()