DOC add missing requirements for building docs
Fixes
@@ -434,10 +434,9 @@ HTML output by building the documentation website.
Building the documentation
^^^^^^^^^^^^^^^^^^^^^^^^^^
-Building the documentation requires the ``sphinx``, ``sphinx-gallery``,
-``numpydoc``, ``matplotlib``, and ``Pillow`` packages::
+Building the documentation requires installing some additional packages::
- pip install sphinx sphinx-gallery numpydoc matplotlib Pillow
+ pip install sphinx sphinx-gallery numpydoc matplotlib Pillow pandas scikit-image
To build the documentation, you need to be in the ``doc`` folder::
