fix more examples

examples/signals.rs

@@ -26,7 +26,7 @@ fn app() -> Element {
         }
     });
 
-    rsx! {
+    render! {
         h1 { "High-Five counter: {count}" }
         button { onclick: move |_| count += 1, "Up high!" }
         button { onclick: move |_| count -= 1, "Down low!" }