fix: fix sending of motd

src/sender.rs

@@ -72,7 +72,7 @@ impl IrcResponseCodes {
     pub fn into_irc_response(&self, receiver: String, message: String) -> IrcResponse {
         IrcResponse {
             sender: None,
-            command: (*self).into(),
+            command: format!("{:03}", (*self) as u16),
             arguments: Vec::new(),
             receiver: Some(receiver),
             message,