rename use_selector to use_memo

examples/global.rs

@@ -4,13 +4,13 @@
 
 use dioxus::prelude::*;
 
-static COUNT: GlobalSignal<i32> = Signal::global(|| 0);
-static DOUBLED_COUNT: GlobalSelector<i32> = Signal::global_selector(|| COUNT() * 2);
-
 fn main() {
     launch(app);
 }
 
+static COUNT: GlobalSignal<i32> = Signal::global(|| 0);
+static DOUBLED_COUNT: GlobalMemo<i32> = Signal::global_memo(|| COUNT() * 2);
+
 fn app() -> Element {
     rsx! {
         h1 { "{COUNT} x 2 = {DOUBLED_COUNT}" }