[css-color-5] split security & privacy as required by new wide review

Author: svgeesus

css-color-5/Overview.bs

@@ -1381,10 +1381,15 @@ is the same as that specified in
  ██████  ████████  ██████   ███████  ██     ██ ████    ██       ██
 -->
 
-Security and Privacy Considerations {#priv-sec}
+Security Considerations {#security}
 ===================================
 
-No new security or privacy considerations have been reported on this specification.
+No new security considerations have been reported on this specification.
+
+Privacy Considerations {#privacy}
+===================================
+
+No new privacy considerations have been reported on this specification.
 
 Accessibility Considerations {#a11y}
 ===========================