[css-scroll-snap-2] Mark as UD / Not Ready

This spec contains a lot of ideas that have not been vetted by the CSSWG.

Author: fantasai

css-scroll-snap-2/Overview.bs

@@ -3,7 +3,8 @@ Title: CSS Scroll Snap Module Level 2
 Group: csswg
 Shortname: css-scroll-snap
 Level: 2
-Status: ED
+Status: UD
+Warning: Not Ready
 Implementation Report: https://wpt.fyi/results/css/css-scroll-snap
 Work Status: Testing
 ED: https://drafts.csswg.org/css-scroll-snap-2/