[css-grid-1][css-grid-2][editorial] Add cross-reference. w3c#7732

Author: fantasai

css-grid-1/Overview.bs

@@ -941,7 +941,7 @@ Scrollable Grid Overflow</h3>
 
 	The 'overflow' property applies to <a>grid containers</a>.
 
-	Just as it is included in intrinsic sizing (see above),
+	Just as it is included in intrinsic sizing (see [[#intrinsic-sizes]]),
 	the <a>grid</a> is also included
 	in a <a>grid container</a>’s <a>scrollable overflow region</a>.
 

css-grid-2/Overview.bs

@@ -989,7 +989,7 @@ Scrollable Grid Overflow</h3>
 
 	The 'overflow' property applies to <a>grid containers</a>.
 
-	Just as it is included in intrinsic sizing (see above),
+	Just as it is included in intrinsic sizing (see [[#intrinsic-sizes]]),
 	the <a>grid</a> is also included
 	in a <a>grid container</a>’s <a>scrollable overflow region</a>.