Adjust description in readme

Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>

examples/README.md

@@ -116,7 +116,7 @@ Example | File | Description
 `texture` | [`3d/texture.rs`](./3d/texture.rs) | Shows configuration of texture materials
 `update_gltf_scene` | [`3d/update_gltf_scene.rs`](./3d/update_gltf_scene.rs) | Update a scene from a gltf file, either by spawning the scene as a child of another entity, or by accessing the entities of the scene
 `wireframe` | [`3d/wireframe.rs`](./3d/wireframe.rs) | Showcases wireframe rendering
-`shapes` | [`3d/shapes.rs`](./3d/shapes.rs) | A scene showcasing more built-in shapes
+`shapes` | [`3d/shapes.rs`](./3d/shapes.rs) | A scene showcasing the built-in 3D shapes
 
 ## Animation