[css-cascade-6][editorial] Update changelog and fix links

Author: mirisuzanne

css-cascade-6/Overview.bs

@@ -27,6 +27,7 @@ spec:css-conditional-3; type:at-rule; text:@media
 spec:mediaqueries-4; type:type; for:@media; text:all
 spec:mediaqueries-4; type:type; text:<media-query>
 spec:selectors-4; type:dfn; text:subject
+spec:html; type:element; text:style
 </pre>
 
 <pre class=ignored-specs>
@@ -319,7 +320,7 @@ Effects of ''@scope''</h4>
 		the ''@scope'' rule’s [=scoping root=].
 		The ''&'' selector is defined to represent
 		the selector representing the [=scoping root=]
-		(the [=scope-start selector=]),
+		(the <<scope-start>> selector),
 		or else '':scope'' if no selector was specified.
 
 	* The [=cascade=] prioritizes declarations
@@ -791,6 +792,15 @@ Changes since the 21 December 2021 First Public Working Draft</h3>
 	Significant changes since the
 	<a href="https://www.w3.org/TR/2021/WD-css-cascade-6-20211221/">21 December 2021 First Public Working Draft</a> include:
 
+	* Clarified ''@scope'' effects on nested '':scope'' and ''&'' selectors.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/8377">Issue 8377</a>)
+
+	* Removed ''@scope'' prelude from specificity calculation.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/8500">Issue 8500</a>)
+
+	* Specified how name-defining [=at-rules=] behave in ''@scope''.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/6895">Issue 6895</a>)
+
 	* Added the {{CSSScopeRule}} interface.
 
 	* Added implicit scopes by making ''<<scope-start>>'' optional.