[css-grid-1] Fix metadata

Author: fantasai

css-grid-1/Overview.bs

@@ -7,7 +7,7 @@ Level: 1
 Group: csswg
 ED: https://drafts.csswg.org/css-grid/
 TR: https://www.w3.org/TR/css-grid-1/
-Implementation Report: Implementation Report: https://wpt.fyi/results/css/css-grid
+Implementation Report: https://wpt.fyi/results/css/css-grid
 Previous version: https://www.w3.org/TR/2020/CR-css-grid-1-20200818/
 Previous version: https://www.w3.org/TR/2017/CR-css-grid-1-20171214/
 Previous version: https://www.w3.org/TR/2017/CR-css-grid-1-20170509/