[resize-observer-1] update ED URL

Author: plinss

resize-observer-1/Overview.bs

@@ -4,9 +4,8 @@ Shortname: resize-observer
 Level: 1
 Status: ED
 Work Status: Exploring
-ED: https://drafts.csswg.org/resize-observer/index.html
+ED: https://drafts.csswg.org/resize-observer-1/
 Group: CSSWG
-URL: https://drafts.csswg.org/resize-observer/index.html
 Editor: Greg Whitworth, Microsoft, gwhit@microsoft.com
 Former Editor: Aleks Totic, Google, atotic@google.com
 Abstract: This specification describes an API for observing changes to Element's size.