message: Trigger scroll on scrolled selection
  ## Summary of the Pull Request
  We accidentally missed switching one `TriggerRedrawAll` to `TriggerScroll`. This does that.
  ## References
  applies logic from this PR
  ## PR Checklist
  * [X] Closes
  ## Validation Steps Performed
  Followed bug repro steps.
diff: @@ -167,7 +167,7 @@ void Terminal::SelectNewRegion(const COORD coordStart, const COORD coordEnd)
  if (notifyScrollChange)
  {
  - _buffer->GetRenderTarget().TriggerRedrawAll();
  + _buffer->GetRenderTarget().TriggerScroll();
  _NotifyScrollEvent();
  }
  