fix: documentation of BY_ADD

Author: SpEcHiDe

pyrogram/enums/chat_join_type.py

@@ -25,7 +25,7 @@ class ChatJoinType(AutoName):
     """How the service message :obj:`~pyrogram.enums.MessageServiceType.NEW_CHAT_MEMBERS` was used for the member to join the chat."""
 
     BY_ADD = auto()
-    "A new member joined the chat via an invite link"
+    "New chat members were added. ``from_user`` will contain the actor. ``new_chat_members`` will contain the user identifiers of the new members."
 
     BY_LINK = auto()
     "A new member joined the chat via an invite link"