package/postgresql: security bump to version 17.7
Release notes:
https://www.postgresql.org/about/news/postgresql-181-177-1611-1515-1420-and-1323-released-3171/
Fixes CVE-2025-12817 & CVE-2025-12818.
Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Julien Olivain <ju.o@free.fr>