Add favicon to Read the Docs (#4375)

Add favicon to Read the Docs

Author: hugovk

docs/conf.py

@@ -129,7 +129,7 @@
 # The name of an image file (within the static path) to use as favicon of the
 # docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
 # pixels large.
-# html_favicon = None
+html_favicon = "resources/favicon.ico"
 
 # 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,