Your patches should be sent to the address for the specific assignment. Each assignment will list the appropriate email to use like so:
$ git send-email --to=whatever_assignment@spring2025-utsa.kdlp.underground.software *.patch
This command attempts to send any file in the current directory ending in
.patch to the mailing list. *.patch is an example of glob expansion
in the shell. See man 7 glob for more information.