[css-grid] Fix error in DoC

Author: fantasai

css-grid/issues-cr-2016.bsi

@@ -2,7 +2,7 @@ Draft:    https://www.w3.org/TR/2016/CR-css-grid-1-20160929/
 Title:    CSS Grid Layout Level 1
 ----
 Issue 1.
-Summary:  Max should override width in minmax()
+Summary:  Max should override min in minmax()
 From:     Ollie Williams
 Comment:  https://lists.w3.org/Archives/Public/www-style/2016Oct/0076.html
 Response: