refactor: update welcome message greeting to be more formal

Author: Bit-Maximum

src/main/java/org/example/Main.java

@@ -13,7 +13,7 @@ private Main() {}
 
     static void main() {
 
-        IO.println(String.format("Hello, super welcome!"));
+        IO.println(String.format("Hello, Sir, welcome!"));
 
         for (int i = 1; i <= 5; i++) {
             IO.println("i = " + i);