[css-overscroll-1][editorial] Split security and privacy sections

Author: svgeesus

css-overscroll-1/Overview.bs

@@ -290,10 +290,14 @@ These properties correspond to the 'overscroll-behavior-x' and 'overscroll-behav
 The mapping depends on the element's 'writing-mode'.
 
 
-Security and Privacy Considerations {#security-and-privacy}
-===========================================================
-There are no known security or privacy impacts of this feature. The feature may be used to prevent
+Security Considerations {#security}
+====================================
+There are no known security impacts of this feature. The feature may be used to prevent
 certain native UI features such as overscroll affordances and overscroll navigations (e.g., pull-
 to-refresh, swipe navigations). However, this does not expose any additional abilities beyond what
 is already possible in the platform e.g., by preventing the default action of the event that would
 cause a scroll.
+
+Privacy Considerations {#privacy}
+=================================
+No new privacy considerations have been reported on this specification.