update sphinx

netlify.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 # This script is used by netlify to build docs
 set -e
-python3 -m pip install '.[docs]'
+python3 -m pip install --break-system-packages '.[docs]'
 cp -r assets docs/
-sphinx-build docs docs/build
+python3 -m sphinx docs docs/build