fix(servo): update servo constructor to vendor version (#1121)

src/servo/embedder.rs

@@ -1,7 +1,10 @@
 use std::rc::Rc;
 
 use servo::{
-  compositing::windowing::{EmbedderEvent, EmbedderMethods, MouseWindowEvent},
+  compositing::{
+    windowing::{EmbedderEvent, EmbedderMethods, MouseWindowEvent},
+    CompositeTarget,
+  },
   embedder_traits::{Cursor, EmbedderMsg, EventLoopWaker},
   euclid::{Point2D, Size2D},
   script_traits::{TouchEventType, WheelDelta, WheelMode},
@@ -41,6 +44,7 @@ impl Embedder {
       Some(String::from(
         "Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/119.0",
       )),
+      CompositeTarget::Window,
     );
 
     init_servo