Fixes path of yafitss in sphinx configuration

yafitss/sourcedoc/source/conf.py

 import os
 import sys
-sys.path.insert(0, os.path.abspath(os.path.join("..", "..")))
-sys.path.insert(0, os.path.abspath(os.path.join("..", "..", "yafitss")))
+sys.path.insert(0, os.path.abspath(os.path.join("..", "..", "..")))
+sys.path.insert(0, os.path.abspath(os.path.join("..", "..", "..", "yafitss")))
 
 # Configuration file for the Sphinx documentation builder.
 #
@@ -35,6 +35,7 @@ exclude_patterns = []
 
 
 
+
 # -- Options for HTML output -------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output