[css-scroll-anchoring-1][editorial] Add TR and previous version

Author: tabatkins

css-scroll-anchoring-1/Overview.bs

@@ -6,6 +6,8 @@ Group: csswg
 Status: ED
 Work Status: Revising
 ED: https://drafts.csswg.org/css-scroll-anchoring
+TR: https://www.w3.org/TR/css-scroll-anchoring-1/
+Previous Version: https://www.w3.org/TR/2020/WD-css-scroll-anchoring-1-20200211/
 Editor: Steve Kobes, Google
 Editor: Tab Atkins-Bittner, Google, http://xanthir.com/contact/, w3cid 42199
 Abstract: Changes in DOM elements above the visible region of a <a>scrolling box</a> can result in the page moving