[css-scoping-1] Fix anchor to go to a heading.

Author: tabatkins

css-scoping-1/Overview.bs

@@ -435,7 +435,7 @@ Selecting Slot-Assigned Content: the ''::slotted()'' pseudo-element</h4>
 <h3 id='shadow-cascading'>
 Shadow Trees and the Cascade</h3>
 
-	See [[css-cascade-4#cascade-context]].
+	See [[css-cascade-4#cascade-order]].
 
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@@ -537,7 +537,7 @@ Name-Defining Constructs and Inheritance</h3>
 	without accidentally polluting each other's namespaces.
 	For example, element IDs,
 	which are generally meant to be unique within a document,
-	can be validly used multiple times 
+	can be validly used multiple times
 	as long as each use is in a different [=shadow tree=].
 
 	Similarly, several [=at-rules=] in CSS,