[css-grid-3][editorial] Fix links

Author: fantasai

css-grid-3/Overview.bs

@@ -104,7 +104,7 @@ Value Definitions</h3>
 	also accept the <a>CSS-wide keywords</a> as their property value.
 	For readability they have not been repeated explicitly.
 
-<h2 id='masonry-layout'>
+<h2 id='grid-template-masonry'>
 Masonry Layout</h2>
 
 	<pre class='propdef partial'>
@@ -115,7 +115,7 @@ Masonry Layout</h2>
 		Inherited: no
 		Percentages: refer to corresponding dimension of the content area
 		Computed value: the keyword ''grid-template-columns/none'' or the keyword ''grid-template-columns/masonry'' or a [[computed track list]]
-		Animation type: see [[css-grid-2#propdef-grid-template-columns|CSS Grid Level 2]]
+		Animation type: see [[css-grid-2#track-sizing|CSS Grid Level 2]]
 	</pre>
 
 	[=Masonry layout=] can be applied to [=grid containers=]
@@ -127,7 +127,7 @@ Masonry Layout</h2>
 	Line names and track sizes can be specified on the [=grid container=],
 	and [=grid items=] can be placed into the tracks and span them
 	using 'grid-column' / 'grid-row' as usual.
-	The [=alignment properties=] work the same as in a regular [=grid container=]
+	The [=box alignment properties=] work the same as in a regular [=grid container=]
 	in the [=grid axis=].
 
 	In the [=masonry axis=] however,