[css-grid-1] s/computed/used/ is more correct here afaict

Author: fantasai

css-grid-1/Overview.bs

@@ -3871,7 +3871,7 @@ Resolve Intrinsic Track Sizes</h3>
 					to the maximum of its items’ <a>min-size contributions</a>.
 					The <dfn noexport>min-size contribution</dfn> of an item is
 					the outer size that would result from assuming
-					the item’s computed 'min-width' or 'min-height' value
+					the item’s used 'min-width' or 'min-height' value
 					(whichever matches the relevant axis)
 					as its specified size ('width' or 'height', whichever matches the relevant axis)
 					if its computed size [=behaves as auto=],