Documentation: Add attachment docs

diff --git a/docs/API/chats.md b/docs/API/chats.md
index 8d925989c459df793919688474cd13aa5bba619a..3ddc1354193226a85f593ebb233b70629af94905 100644 (file)
--- a/docs/API/chats.md
+++ b/docs/API/chats.md
@@ -160,6 +160,7 @@ Posting a chat message for given Chat id works like this:
 
 Parameters:
 - content: The text content of the message
+- media_id: The id of an upload that will be attached to the message.
 
 Currently, no formatting beyond basic escaping and emoji is implemented, as well as no
 attachments. This will most probably change.