fix manganis support for dioxus desktop

examples/custom_assets.rs

@@ -4,7 +4,8 @@ use dioxus::prelude::*;
 static ASSET_PATH: &str = "examples/assets/logo.png";
 
 #[cfg(feature = "collect-assets")]
-static ASSET_PATH: &str = manganis::mg!(image("examples/assets/logo.png").format(ImageType::Avif));
+static ASSET_PATH: &str =
+    manganis::mg!(image("examples/assets/logo.png").format(ImageType::Avif)).path();
 
 fn main() {
     launch(app);