Avoid use of Vector::uncheckedAppend() in RemoteLayerTreeDrawingArea::updateRendering() as this is hot code and uncheckedAppend() has recently become an alias to append().
Pull request: https://github.com/WebKit/WebKit/pull/18716
Committed 268949@main (d192abf745ff): <https://commits.webkit.org/268949@main> Reviewed commits have been landed. Closing PR #18716 and removing active labels.