
This updates our thread extension and tox command for docs builds to use the available number of cores to multithread the docs build. This can speed things up significantly. Depends-on: https://review.opendev.org/741026 Change-Id: I1ba656390094b4e1c6d3fb7bb3028eadb11c4d08 Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>