[css-images-3] Update Changes to deprecation of image-orientation.

Author: fantasai

css-images-3/Overview.bs

@@ -1810,10 +1810,9 @@ Changes Since the <a href="https://www.w3.org/TR/2012/CR-css3-images-20120417/">
 
 	- The <css>image()</css> notation has been deferred to Level 4.
 	- The <css>image-resolution</css> property has been deferred to Level 4.
-	- The 'image-orientation' property has been marked as At-Risk. Additionally:
+	- The 'image-orientation' property has been marked as deprecated, optional, and at-risk. Additionally:
 		- Added the ''from-image'' and ''image-orientation/none'' keywords
-		- Deprecated the <<angle>> values
-		- Added and deprecated the <css>flip</css> values
+		- Added the <css>flip</css> values
 		- <a href="https://github.com/w3c/csswg-drafts/issues/1206">Swapped to "mod then round" ordering.</a>
 	- Added the 'image-rendering' property.
 	- Moved the <<resolution>> type to [[css-values-3]].