package/postgresql: security bump version to 16.3
Release notes: https://www.postgresql.org/about/news/postgresql-163-157-1412-1315-and-1219-released-2858/
Fixes CVE-2024-4317.
Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>