package/postgresql: security bump version to 16.7
Release notes:
https://www.postgresql.org/docs/release/16.7/
https://www.postgresql.org/about/news/postgresql-173-167-1511-1416-and-1319-released-3015/
Fixes CVE-2025-1094:
https://www.postgresql.org/support/security/CVE-2025-1094/
Updated license hash due to copyright year bump:
https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=759620716adb347c1d8c8b2e6f7d88b947a54c98
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>