Use sphinx-to-sqlite==0.1a1

To address this bug: https://github.com/simonw/sphinx-to-sqlite/issues/2

.github/workflows/deploy-latest.yml

@@ -27,7 +27,7 @@ jobs:
         python -m pip install --upgrade pip
         python -m pip install -e .[test]
         python -m pip install -e .[docs]
-        python -m pip install sphinx-to-sqlite
+        python -m pip install sphinx-to-sqlite==0.1a1
     - name: Run tests
       run: pytest
     - name: Build fixtures.db