Replace deprecated simple_logger initialization

examples/multiwindow.rs

@@ -1,4 +1,6 @@
 use std::collections::HashMap;
+
+use simple_logger::SimpleLogger;
 use winit::{
     event::{ElementState, Event, KeyboardInput, WindowEvent},
     event_loop::{ControlFlow, EventLoop},
@@ -6,7 +8,7 @@ use winit::{
 };
 
 fn main() {
-    simple_logger::init().unwrap();
+    SimpleLogger::new().init().unwrap();
     let event_loop = EventLoop::new();
 
     let mut windows = HashMap::new();