TMP use nengo-sphinx-theme:update-sphinx branch

.nengobones.yml

@@ -64,6 +64,7 @@ ci_scripts:
   - template: docs
     pre_commands:
       - cat bones-scripts/docs.sh
+      - pip install git+https://github.com/nengo/nengo-sphinx-theme@update-sphinx#egg=nengo-sphinx-theme
     pip_install:
       - sphinx-click>=2.0.1
   - template: examples