Update for renamed Swift message reaction send method

See chat-swift commit 464bf10.

Author: lawrence-forooghian

src/pages/docs/chat/rooms/message-reactions.mdx

@@ -120,20 +120,20 @@ await room.messages.reactions.send(message, {
 
 ```swift
 // Send a 👍 reaction using the default type
-await room.messages.reactions.send(to: message.serial, params: .init(name: "👍"))
+await room.messages.reactions.send(messageSerial: message.serial, params: .init(name: "👍"))
 
 // The reaction can be anything, not just UTF-8 emojis:
-await room.messages.reactions.send(to: message.serial, params: .init(name: ":like:"))
-await room.messages.reactions.send(to: message.serial, params: .init(name: "+1"))
+await room.messages.reactions.send(messageSerial: message.serial, params: .init(name: ":like:"))
+await room.messages.reactions.send(messageSerial: message.serial, params: .init(name: "+1"))
 
 // Send a :love: reaction using the Unique type
-await room.messages.reactions.send(to: message.serial, params: .init(
+await room.messages.reactions.send(messageSerial: message.serial, params: .init(
   reaction: ":love:",
   type: .unique
 ))
 
 // Send a ❤️ reaction with count 100 using the Multiple type
-await room.messages.reactions.send(to: message.serial, params: .init(
+await room.messages.reactions.send(messageSerial: message.serial, params: .init(
   reaction: "❤️",
   type: .multiple,
   count: 100