[css-images-3] Annotate tests into changes list for image-orientation change.

Author: fantasai

css-images-3/Overview.bs

@@ -1888,6 +1888,12 @@ Changes Since the <a href="https://www.w3.org/TR/2019/CR-css-images-3-20191010/"
 		(<a href="https://github.com/w3c/csswg-drafts/issues/4793">Issue 4793</a>)
 	* Define that 'image-orientation' applies to both decorative and content images
 		(<a href="https://github.com/w3c/csswg-drafts/issues/5245">Issue 5245</a>)
+		<!--
+		wpt/css/css-images/image-orientation/image-orientation-background-image.html
+		wpt/css/css-images/image-orientation/image-orientation-border-image.html
+		wpt/css/css-images/image-orientation/image-orientation-cursor.html
+		wpt/css/css-images/image-orientation/image-orientation-list-style-image.html
+		-->
 
 <h3 id="changes-20120407">
 Changes Since the <a href="https://www.w3.org/TR/2012/CR-css3-images-20120417/">17 April 2012 Candidate Recommendation</a></h3>