docs: Fix styles on GH pages

Author: Néstor Salceda

doc/conf.py

@@ -102,7 +102,7 @@
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+html_static_path = ['static']
 
 # -- Options for HTMLHelp output ------------------------------------------