fix more examples

examples/readme.rs

@@ -11,7 +11,7 @@ fn main() {
 fn app() -> Element {
     let mut count = use_signal(|| 0);
 
-    rsx! {
+    render! {
         h1 { "High-Five counter: {count}" }
         button { onclick: move |_| count += 1, "Up high!" }
         button { onclick: move |_| count -= 1, "Down low!" }