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/file_upload.rs

@@ -8,7 +8,7 @@ use std::sync::Arc;
 use dioxus::prelude::*;
 use dioxus::{html::HasFileData, prelude::dioxus_elements::FileEngine};
 
-const STYLE: &str = asset!(file("./examples/assets/file_upload.css"));
+const STYLE: &str = asset!("./examples/assets/file_upload.css");
 
 fn main() {
     launch(app);
@@ -43,7 +43,7 @@ fn app() -> Element {
     };
 
     rsx! {
-        link { rel: "stylesheet", href: STYLE }
+        head::Link { rel: "stylesheet", href: STYLE }
 
         h1 { "File Upload Example" }
         p { "Drop a .txt, .rs, or .js file here to read it" }