chore: rename all &cx to cx, make clipppy happy

README.md

@@ -54,7 +54,7 @@ Dioxus is a portable, performant, and ergonomic framework for building cross-pla
 
 ```rust
 fn app(cx: Scope) -> Element {
-    let mut count = use_state(&cx, || 0);
+    let mut count = use_state(cx, || 0);
 
     cx.render(rsx! {
         h1 { "High-Five counter: {count}" }