Document new Daily helper room params

server/utilities/daily/rest-helpers.mdx

@@ -42,6 +42,9 @@ Properties that configure a Daily room's behavior and features.
 <ResponseField name="enable_chat" type="boolean" default={false}>
   Whether chat is enabled in the room
 </ResponseField>
+<ResponseField name="enable_prejoin_ui" type="boolean" default={false}>
+  Whether the prejoin lobby UI is enabled
+</ResponseField>
 <ResponseField name="enable_emoji_reactions" type="boolean" default={false}>
   Whether emoji reactions are enabled
 </ResponseField>
@@ -51,12 +54,18 @@ Properties that configure a Daily room's behavior and features.
 <ResponseField name="enable_dialout" type="boolean" optional>
   Whether dial-out is enabled
 </ResponseField>
+<ResponseField name="max_participants" type="number" optional>
+  Maximum number of participants allowed in the room
+</ResponseField>
 <ResponseField name="sip" type="DailyRoomSipParams" optional>
   SIP configuration parameters
 </ResponseField>
 <ResponseField name="sip_uri" type="dict" optional>
   SIP URI configuration
 </ResponseField>
+<ResponseField name="start_video_off" type="boolean">
+  Whether the camera video is turned off by default
+</ResponseField>
 
 ```python
 import time