Fix the references to children

index.bs

@@ -5454,7 +5454,7 @@ an |ownership type|, a |serialization internal map|, a |realm| and a |session|:
 
             1. Set |serialized|["<code>namespaceURI</code>"] to [=Get=](|value|, "namespaceURI")
 
-          1. Let |child node count| be the [=list/size=] of |value|'s [=children=].
+          1. Let |child node count| be the [=list/size=] of |value|'s <a spec=dom>children</a>.
 
           1. Set |serialized|["<code>childNodeCount</code>"] to |child node count|.
 
@@ -5466,7 +5466,7 @@ an |ownership type|, a |serialization internal map|, a |realm| and a |session|:
              "<code>closed</code>", let |children| be null.
 
              Otherwise, let |children| be an empty
-             [=/list=] and, for each node |child| in the [=children=] of
+             [=/list=] and, for each node |child| in the <a spec=dom>children</a> of
              |value|:
 
             1. Let |child serialization options| be a [=map/clone=] of