Use head elements and new manganis syntax in examples (#2688)

* use head elements and new manganis syntax in examples
* only enable desktop workspace example scraping during a dioxus release

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Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

examples/counters.rs

@@ -2,7 +2,7 @@
 
 use dioxus::prelude::*;
 
-const STYLE: &str = asset!(file("./examples/assets/counter.css"));
+const STYLE: &str = asset!("./examples/assets/counter.css");
 
 fn main() {
     launch(app);
@@ -16,7 +16,7 @@ fn app() -> Element {
     let sum = use_memo(move || counters.read().iter().copied().sum::<i32>());
 
     rsx! {
-        link { rel: "stylesheet", href: STYLE }
+        head::Link { rel: "stylesheet", href: STYLE }
 
         div { id: "controls",
             button { onclick: move |_| counters.write().push(0), "Add counter" }