add translate mode ref link

Signed-off-by: fufesou <shuanglongchen@yeah.net>

src/keyboard.rs

@@ -942,6 +942,7 @@ fn is_press(event: &Event) -> bool {
     matches!(event.event_type, EventType::KeyPress(_))
 }
 
+// https://github.com/fufesou/rustdesk/wiki/Keyboard-mode----Translate-Mode
 pub fn translate_keyboard_mode(peer: &str, event: &Event, key_event: KeyEvent) -> Vec<KeyEvent> {
     let mut events: Vec<KeyEvent> = Vec::new();
     if let Some(unicode_info) = &event.unicode {