Update index.rst

Author: RDaxini

docs/sphinx/source/user_guide/index.rst

@@ -8,8 +8,7 @@ This user guide is an overview and explains some of the key features of pvlib.
 
 .. toctree::
    :maxdepth: 2
-   :hidden:
-
+   
    getting_started/index
    modeling_topics/index
    extras/index