[css-scroll-snap-1] Mark scroll-snap-type capturing snap positions on non-scroll-containers as at-risk, due to implementation difficulty.

Author: fantasai

css-scroll-snap-1/Overview.bs

@@ -25,6 +25,7 @@ Editor: Elika J. Etemad / fantasai, Invited Expert, http://fantasai.inkedblade.n
 Abstract: This module contains features to control panning and scrolling behavior with “snap positions”.
 Ignored Terms: containing block chain, scroll position, scrollport
 At Risk: 'scroll-snap-stop'
+At Risk: whether 'scroll-snap-type' can cause boxes that are not [=scroll containers=] to [=capture snap positions=] (see <a href="https://github.com/w3c/csswg-drafts/issues/4496">discussion</a>)
 Status Text:
  A test suite and an implementation report will be produced during the
  CR period.