[css-values-4][editorial] Note that CSS-loaded resources are cached same as any other. w3c#5591

Author: tabatkins

css-values-4/Overview.bs

@@ -1051,9 +1051,12 @@ URL Processing Model</h4>
 
 		11. [=/Fetch|fetching=] |req|, with [=fetch/processresponseconsumebody=] set to
 			|processResponse|.
-
 	</div>
 
+	Note: Resources loaded through CSS style sheets
+	are cached and cleared the same as any other resources
+	linked from the document.
+
 <h2 id="numeric-types">
 Numeric Data Types</h2>