[css-color-hdr][editorial] Separate Privacy and Security sections

Author: svgeesus

css-color-hdr/Overview.bs

@@ -691,9 +691,14 @@ For: @some-at-rule
 
 Issue: Do the PQ-based color spaces require tone-mapping (OOTF) for display in different viewing environments?
 
-<h2 class=no-num id=priv-sec>Privacy and Security Considerations</h2>
+<h2 class=no-num id=privacy>Privacy Considerations</h2>
+
+No Privacy concerns have been raised on this document
+
+<h2 class=no-num id=security>Security Considerations</h2>
+
+No Security concerns have been raised on this document
 
-Issue: Make some considerations about privacy and security.
 
 <h2 class="no-num" id="a11y">Accessibility Considerations</h2>