Bug#1029183: python-pgspecial: Dependency and build dependency must be updated to python3-psycopg3 -> python3-psycopg

[Adrian Bunk]

Source: python-pgspecial
Version: 2.0.1-1
Severity: serious
Tags: ftbfs
Control: affects -1 python3-pgspecial

python3-psycopg3 does not exist anymore, see #1016031.