docs: add notes regarding ``get-pip.py`` during the release
docs: add notes regarding ``get-pip.py`` during the release

xavfernandez/pip,pypa/pip,xavfernandez/pip,sbidoul/pip,pradyunsg/pip,sbidoul/pip,xavfernandez/pip,pfmoore/pip,pfmoore/pip,pradyunsg/pip,pypa/pip