[css-color-hdr] Adopt as ED, w3c#553

Author: svgeesus

css-color-hdr/Overview.bs

@@ -2,7 +2,7 @@
 Title: CSS Color HDR Module Level 1
 Shortname: css-color-hdr
 Level: 1
-Status: UD
+Status: ED
 Group: csswg
 TR: https://www.w3.org/TR/css-color-hdr/
 ED: https://drafts.csswg.org/css-color-hdr/