[css-color-adjust-1] Note getComputedStyle specifically in priv-sec

Author: fantasai

css-color-adjust-1/Overview.bs

@@ -525,7 +525,8 @@ Privacy and Security Considerations {#privsec}
 ===================================
 
 	Applying user color preferences via [=color schemes=] or [=forced colors mode=]
-	exposes the user's color preferences to the page,
+	exposes the user's color preferences to the page
+	via {{getComputedStyle()}},
 	which can increase fingerprinting surface.
 
 	Additionally, it may be possible for an embedded document