[css-cascade-5] Link more detailed issues

Author: mirisuzanne

css-cascade-5/Overview.bs

@@ -1117,7 +1117,7 @@ Declaring Cascade Layers: the ''@layer'' rule</h4>
 	so the ordering of layers in the light DOM has no impact
 	on the order of identically-named layers in the shadow DOM.
 
-	Issue(w3c/csswg-drafts#4984): How do Cascade Layers interact with Shadow DOM?
+	Issue(w3c/csswg-drafts#5854): Provide a syntax for re-using cascade layers across encapsulation context?
 
 	The ''@layer'' rule can also be used to define new layers
 	without assigning any style rules, by providing only a [=layer name=]:
@@ -1129,7 +1129,7 @@ Declaring Cascade Layers: the ''@layer'' rule</h4>
 	Such empty ''@layer'' are allowed
 	anywhere either import ''@layer'' or block ''@layer'' rules are allowed.
 
-	Issue(w3c/csswg-drafts#4969): What are the proper "levels" for managing Cascade Layers?
+	Issue(w3c/csswg-drafts#5853): Provide an attribute for assigning link or style elements to cascade layers
 
 	<div class="example">
 		Layer identifiers are optional,