[css-color-adjust-1][editorial] Separate Privacy and Security sections

Author: svgeesus

css-color-adjust-1/Overview.bs

@@ -728,7 +728,7 @@ The 'color-adjust' Shorthand {#color-adjust}
 	in other contexts than the one intended.
 
 
-Privacy and Security Considerations {#priv-sec}
+Privacy Considerations {#privacy}
 ===================================
 
 	Applying user color preferences via [=color schemes=] or [=forced colors mode=]
@@ -753,7 +753,10 @@ Privacy and Security Considerations {#priv-sec}
 		for discussion on this topic.
 	</div>
 
-	Additionally, it may be possible for an embedded document
+Security Considerations {#security}
+===================================
+
+	It may be possible for an embedded document
 	to use timing attacks to determine whether its own 'color-scheme'
 	matches that of its embedding <{iframe}> or not.