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/image_generator_openai.rs

@@ -36,7 +36,7 @@ fn app() -> Element {
     });
 
     rsx! {
-        head { link { rel: "stylesheet", href: "https://unpkg.com/bulma@0.9.0/css/bulma.min.css" } }
+        head::Link { rel: "stylesheet", href: "https://unpkg.com/bulma@0.9.0/css/bulma.min.css" }
         div { class: "container",
             div { class: "columns",
                 div { class: "column",