feat: update docstring!

Author: amindadgar

hivemind_etl/website/website_etl.py

@@ -17,6 +17,10 @@ def __init__(
         -----------
         community_id : str
             the community to save its data
+        platform_id : str
+            the platform to save its data
+        
+        Note: the collection name would be `community_id_platform_id`
         """
         if not community_id or not isinstance(community_id, str):
             raise ValueError("community_id must be a non-empty string")