Needed to gain an additional bit of unused space in `RenderStyle::NonInheritedFlags` for new pseudo-elements.
<rdar://problem/118374921>
Pull request: https://github.com/WebKit/WebKit/pull/20462
Committed 270715@main (5c50677827c0): <https://commits.webkit.org/270715@main> Reviewed commits have been landed. Closing PR #20462 and removing active labels.