Pin sphinx until nbsphinx is updated (DigitalSlideArchive#1155)

Author: manthey

.circleci/config.yml

@@ -280,7 +280,7 @@ jobs:
           command: pip install -U pip
       - run:
           name: Install python packages
-          command: pip install setuptools_scm twine
+          command: pip install setuptools_scm
       - run:
           name: Build wheels
           command: ./build_wheels.sh

tox.ini

@@ -51,7 +51,7 @@ deps =
   jupyter
   nbsphinx
   pypandoc
-  sphinx
+  sphinx<8.2
   sphinx-rtd-theme
 changedir = {toxinidir}/docs
 allowlist_externals =