git version: README is outdated

[spookyvision]

Describe the bug
README mentions nonexistent example and feature

To Reproduce

• run this line from the README: cargo run run --example platformer --features bevy_xpbd_3d
• realize there's one run too many, remove that and try cargo run --example platformer --features bevy_xpbd_3d
• error: the package 'space_editor' does not contain this feature: bevy_xpbd_3d
• remove that feature: cargo run --example platformer
• result:

error: no example target named `platformer`.
Available example targets:
    custom_editor_tab
    custom_event
    gltf_unpack_example
    loading_test
    space_example
    spawn_prefab

Expected behavior
platformer example starts

Screenshots

Desktop (please complete the following information):

Additional context

[rewin123]

Thanks. Will fix