move table of contents script to scripts directory

Author: Blargian

docs/en/chdb/guides/autogen_table_of_contents_guides.py

@@ -2,8 +2,8 @@
 import os
 
 """
-This script is used to automatically generate a table of contents from the changelogs.
-It is only necessary to run this script if a new guide .md file has been added to the guides directory.
+This script can be used to automatically generate a table of contents (JSON file) from the markdown files in a directory.
+TO DO: modify to run with a list of directories and place the JSON files at those directories.
 """