[css-2023] Add conditional 4 and cascade 5

Author: svgeesus

css-2023/Overview.bs

@@ -556,6 +556,16 @@ Modules with Rough Interoperability</h3>
 		  [[!CSS-COLOR-ADJUST-1]]
 		<dd>
 			This module introduces a model and controls over automatic color adjustment by the user agent to handle user preferences and device output optimizations.
+
+		<dt><a href="https://www.w3.org/TR/css-conditional-4/">CSS Conditional Rules Module Level 4</a>
+		[[!CSS-CONDITIONAL-4]]
+		</dt>
+		<dd>Extends CSS Conditional 3 to allow testing for supported selectors.</dd>
+		
+		<dt><a href="https://www.w3.org/TR/css-cascade-5/">CSS Cascading and Inheritance Level 5</a>
+		[[!CSS-CASCADE-5]]
+		</dt>
+		<dd>Extends CSS Cascade 4 to add cascade layers.</dd>
 	</dl>
 
 <h3 id="css-levels">