[css-transitions-1] Update TR link to point to new versioned URL

Author: birtles

css-transitions-1/Overview.bs

@@ -29,7 +29,7 @@ Work Status: Refining
 Shortname: css-transitions
 Group: csswg
 Level: 1
-TR: https://www.w3.org/TR/css3-transitions/
+TR: https://www.w3.org/TR/css-transitions-1/
 Previous version: https://www.w3.org/TR/2013/WD-css3-transitions-20131119/
 ED: https://drafts.csswg.org/css-transitions/
 Editor: L. David Baron, Mozilla https://www.mozilla.org/, https://dbaron.org/, w3cid 15393