update docs

Author: liugangcode

docs/source/conf.py

@@ -34,5 +34,5 @@
 
 import os
 import sys
-sys.path.insert(0, os.path.abspath('../../torch_molecule'))  # adjust as needed
-
+sys.path.insert(0, os.path.abspath('../..'))
+# check the path of ../..