message: Add scikit-learn to build python doc
diff: @@ -54,7 +54,7 @@ before_cache:
  # When installing through libcgal-dev apt, CMake Error at CGAL Exports.cmake The imported target "CGAL::CGAL Qt5" references the file
  install:
  - python3 -m pip install --upgrade pip setuptools wheel
  - - python3 -m pip install --user pytest Cython sphinx sphinxcontrib-bibtex sphinx-paramlinks matplotlib numpy scipy
  + - python3 -m pip install --user pytest Cython sphinx sphinxcontrib-bibtex sphinx-paramlinks matplotlib numpy scipy scikit-learn
  - python3 -m pip install --user POT
  script:
  