further update to message update and delete

TODO squash into previous if
ably/ably-chat-swift#429 merged, this is

453abb098d2f43d89b22474d47b0e2e1e8269252

Author: lawrence-forooghian

src/pages/docs/chat/getting-started/swift.mdx

@@ -487,7 +487,7 @@ struct ContentView: View {
 
         do {
             let updateMessageParams = UpdateMessageParams(text: newMessage)
-            _ = try await room.messages.update(forSerial: editingMessage.serial params: updateMessageParams, details: nil)
+            _ = try await room.messages.update(withSerial: editingMessage.serial params: updateMessageParams, details: nil)
             self.editingMessage = nil
             newMessage = ""
         } catch {
@@ -1172,7 +1172,7 @@ private func deleteMessage(_ message: Message) async {
     guard let room = room else { return }
 
     do {
-        _ = try await room.messages.delete(forSerial: message.serial, details: nil)
+        _ = try await room.messages.delete(withSerial: message.serial, details: nil)
     } catch {
         print("Failed to delete message: \(error)")
     }

src/pages/docs/chat/rooms/messages.mdx

@@ -224,7 +224,7 @@ Message updates were added in version 0.3 for the JavaScript and React SDKs, and
 </Aside>
 
 <If lang="javascript,swift,kotlin">
-Use the <If lang="javascript">[`messages.update()`](https://sdk.ably.com/builds/ably/ably-chat-js/main/typedoc/interfaces/chat-js.Messages.html#update)</If><If lang="swift">[`messages.update()`](https://sdk.ably.com/builds/ably/ably-chat-swift/main/AblyChat/documentation/ablychat/messages/update%28forserial:params:details:%29)</If><If lang="kotlin">[`messages.update()`](https://sdk.ably.com/builds/ably/ably-chat-kotlin/main/dokka/chat-android/com.ably.chat/-messages/update.html)</If> method to update a message in a chat room. All users that are [subscribed](#subscribe) to messages on that room will receive the update:
+Use the <If lang="javascript">[`messages.update()`](https://sdk.ably.com/builds/ably/ably-chat-js/main/typedoc/interfaces/chat-js.Messages.html#update)</If><If lang="swift">[`messages.update()`](https://sdk.ably.com/builds/ably/ably-chat-swift/main/AblyChat/documentation/ablychat/messages/update%28withserial:params:details:%29)</If><If lang="kotlin">[`messages.update()`](https://sdk.ably.com/builds/ably/ably-chat-kotlin/main/dokka/chat-android/com.ably.chat/-messages/update.html)</If> method to update a message in a chat room. All users that are [subscribed](#subscribe) to messages on that room will receive the update:
 </If>
 
 <If lang="react">
@@ -423,7 +423,7 @@ Message deletion was added in version 0.3 for the JavaScript and React SDKs, and
 </Aside>
 
 <If lang="javascript,swift,kotlin">
-Use the <If lang="javascript">[`messages.delete()`](https://sdk.ably.com/builds/ably/ably-chat-js/main/typedoc/interfaces/chat-js.Messages.html#delete)</If><If lang="swift">[`messages.delete()`](https://sdk.ably.com/builds/ably/ably-chat-swift/main/AblyChat/documentation/ablychat/messages/delete%28forserial:details:%29)</If><If lang="kotlin">[`messages.delete()`](https://sdk.ably.com/builds/ably/ably-chat-kotlin/main/dokka/chat-android/com.ably.chat/-messages/delete.html)</If> method to delete a message in a chat room. All users that are [subscribed](#subscribe) to messages on that room will receive the deletion:
+Use the <If lang="javascript">[`messages.delete()`](https://sdk.ably.com/builds/ably/ably-chat-js/main/typedoc/interfaces/chat-js.Messages.html#delete)</If><If lang="swift">[`messages.delete()`](https://sdk.ably.com/builds/ably/ably-chat-swift/main/AblyChat/documentation/ablychat/messages/delete%28withserial:details:%29)</If><If lang="kotlin">[`messages.delete()`](https://sdk.ably.com/builds/ably/ably-chat-kotlin/main/dokka/chat-android/com.ably.chat/-messages/delete.html)</If> method to delete a message in a chat room. All users that are [subscribed](#subscribe) to messages on that room will receive the deletion:
 </If>
 
 <If lang="react">