fix compilation

Author: ThierryBerger

bevy_rapier2d/examples/testbed2.rs

@@ -13,7 +13,10 @@ mod player_movement2;
 mod rope_joint2;
 mod voxels2;
 
-use bevy::{ecs::world::error::EntityMutableFetchError, prelude::*};
+use bevy::{
+    ecs::world::error::{EntityDespawnError, EntityMutableFetchError},
+    prelude::*,
+};
 use bevy_egui::{egui, EguiContexts, EguiPlugin};
 use bevy_inspector_egui::quick::WorldInspectorPlugin;
 use bevy_rapier2d::prelude::*;