[css-scroll-snap-2] Mark as ED

This was marked as UD, however, all of the features have been discussed.
Previous resolutions:
scroll-start: w3c#6986 (comment)
:snapped, snapChanged and snapChanging and creation of css-scroll-snap-2 ED: w3c#6985 (comment)

Author: flackr

css-scroll-snap-2/Overview.bs

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