sage-env: Fix misconfiguration of pip #34853
Description
./sage -sh -c 'pip cache' git:t/34851/upgrade_singular_to_4_3_1p3
An error occurred during configuration: option format: invalid choice: 'columns' (choose from 'human', 'abspath')
as noted in #34850 comment:19
CC: @dimpase
Component: scripts
Author: Matthias Koeppe
Branch/Commit: 580dec9
Reviewer: Dima Pasechnik
Issue created by migration from https://trac.sagemath.org/ticket/34853