fix empty docs clippy warning

packages/desktop/src/assets.rs

@@ -3,7 +3,7 @@ use rustc_hash::FxHashMap;
 use std::{cell::RefCell, rc::Rc};
 use wry::{http::Request, RequestAsyncResponder};
 
-///
+/// A request for an asset within dioxus-desktop.
 pub type AssetRequest = Request<Vec<u8>>;
 
 pub struct AssetHandler {