change the script format for v3.12.0

[ESadek-MO]

When releasing v3.11.0, we missed the change below. The bot has tried to fix it in #124, but rather than releasing a new build, I think it's fine to just do this when releasing v3.12.0. @bjlittle @ESadek-MO are lead and buddy, respectively.

build:
noarch: python
script: python -m pip install --no-deps --ignore-installed . ➡ script: {{ PYTHON }} -m pip install . --no-deps -vv
number: 0