Update tools/requirements/docs.txt
Update tools/requirements/docs.txt

Co-Authored-By: Pradyun Gedam <d57123e724a720d5727375fe7954e02b18dae45d@gmail.com>
sbidoul/pip,pfmoore/pip,pfmoore/pip,sbidoul/pip,pradyunsg/pip,pradyunsg/pip,pypa/pip,pypa/pip