Make cargo check --all --examples work!

examples/file_explorer.rs

@@ -12,7 +12,7 @@ use dioxus::prelude::*;
 use dioxus_desktop::{Config, WindowBuilder};
 
 fn main() {
-    LaunchBuilder::new()
+    LaunchBuilder::desktop()
         .with_cfg(Config::new().with_window(WindowBuilder::new().with_resizable(true)))
         .launch(app)
 }