Added empty Privacy and Security sections

Author: svgeesus

compositing-1/Overview.bs

@@ -1419,13 +1419,24 @@ If this rule is not followed, an attacker could infer information and mount a ti
    of the element.</p>
 </div>
 
-<h2 id=changes>Changes</h2>
+<h2 id="privacy" class="no-num">
+Privacy Considerations</h2>
+  
+  <p>No new privacy considerations have been reported on this specification.</p>
+  
+<h3 id="security" class="no-num">
+Security Considerations</h2>
+  
+  <p>No new security considerations have been reported on this specification.</p>
+
+<h2 id="changes" class="no-num">Changes</h2>
 
 The following changes were made relative to the <a
 href="https://www.w3.org/TR/2015/CR-compositing-1-20150113/"> Candidate Recommendation of 13 January 2015</a>:
 
 <ul>
   <!-- to 7 March 2024 -->
+  <li>Added Privacy and Security sections</li>
   <li>Updated Animatable: no to Animation type: discrete</li>
   <li>Defined root elements for HTML and SVG, and the root element group</li>
   <li>Clarified that root groups are not necessarily opaque white</li>