chore(python): avoid `.nox` directories when building docs#162

gcf-merge-on-green[bot] merged 1 commit intomastergoogleapis/python-error-reporting:masterfrom

owl-bot-update-lock-a1a891041baa4ffbe1a809ac1b8b9b4a71887293c9101c88e8e255943c5aec2dgoogleapis/python-error-reporting:owl-bot-update-lock-a1a891041baa4ffbe1a809ac1b8b9b4a71887293c9101c88e8e255943c5aec2dCopy head branch name to clipboard