Fix as web event (#3178)

packages/web/src/events/composition.rs

@@ -18,7 +18,6 @@ impl WebEventExt for dioxus_html::CompositionData {
 
     #[inline(always)]
     fn try_as_web_event(&self) -> Option<Self::WebEvent> {
-        self.downcast::<Synthetic<web_sys::CompositionEvent>>()
-            .map(|e| e.event.clone())
+        self.downcast::<web_sys::CompositionEvent>().cloned()
     }
 }