message: fix help for scrollFocus
diff: @@ -29,7 +29,7 @@ export const DefaultTrackballBindings = {
  dragFocusZoom: Binding(Trigger(B.Flag.Auxilary, M.create()), 'Focus and zoom the 3D scene by dragging using ${trigger}'),
  scrollZoom: Binding(Trigger(B.Flag.Auxilary, M.create()), 'Zoom the 3D scene by scrolling using ${trigger}'),
  - scrollFocus: Binding(Trigger(B.Flag.Auxilary, M.create({ shift: true })), 'Focus the 3D scene by dragging using ${trigger}'),
  + scrollFocus: Binding(Trigger(B.Flag.Auxilary, M.create({ shift: true })), 'Focus the 3D scene by scrolling using ${trigger}'),
  scrollFocusZoom: Binding.Empty,
  }
  