Use older version of Sphinx, see it fixes documentation build

Author: oleksandr-pavlyk

.github/workflows/generate-docs.yml

@@ -49,7 +49,7 @@ jobs:
         if: ${{ !github.event.pull_request || github.event.action != 'closed' }}
         shell: bash -l {0}
         run: |
-          pip install numpy cython setuptools scikit-build cmake sphinx sphinx_rtd_theme pydot graphviz sphinxcontrib-programoutput sphinxcontrib-googleanalytics
+          pip install numpy cython setuptools scikit-build cmake sphinx"<7.2" sphinx_rtd_theme pydot graphviz sphinxcontrib-programoutput sphinxcontrib-googleanalytics
       - name: Checkout repo
         uses: actions/checkout@v3
         with: