Doc for Third person camera jitter problem

[alexniver]

when using CharacterController and Camera follow the player (Third person camera), camera will jitter, same issue in avina

this problem can fixed by add

  .configure_sets(
      PostUpdate,
      TppUpdateSet
          .after(PhysicsSet::Writeback)
          .before(TransformSystem::TransformPropagate),
  )

I think this solution should be in doc.