use pandoc ?

Author: paquiteau

.github/workflows/ci-build.yml

@@ -49,6 +49,7 @@ jobs:
       - name: Check API Documentation build
         shell: bash -l {0}
         run: |
+          apt install pandoc
           pip install .[doc] ipykernel
           sphinx-apidoc -t docs/_templates -feTMo docs/source modopt
           sphinx-build -b doctest -E docs/source docs/_build