Fix derives in test

Co-authored-by: Jan Hohenheim <jan@hohenheim.ch>

crates/avian_derive/src/lib.rs

@@ -24,7 +24,7 @@ use syn::{parse_macro_input, spanned::Spanned, Data, DeriveInput};
 /// # Example
 ///
 /// ```ignore
-/// #[derive(PhysicsLayer, Default)]
+/// #[derive(PhysicsLayer, Clone, Copy, Debug, Default)]
 /// enum GameLayer {
 /// #[default]
 /// Default, // Layer 0 - the default layer that objects are assigned to