[css-contain-1] Update Previous Version

Author: xfq

css-contain-1/Overview.bs

@@ -7,6 +7,7 @@ Work Status: stable
 Group: csswg
 ED: https://drafts.csswg.org/css-contain/
 TR: https://www.w3.org/TR/css-contain-1/
+Previous Version: https://www.w3.org/TR/2018/CR-css-contain-1-20181108/
 Previous Version: https://www.w3.org/TR/2018/CR-css-contain-1-20180524/
 Previous Version: https://www.w3.org/TR/2017/CR-css-contain-1-20170808/
 Previous Version: https://www.w3.org/TR/2017/WD-css-contain-1-20170419/