[css-text-3] Separate privacy and security sections

Author: frivoal

css-text-3/Overview.bs

@@ -8060,15 +8060,20 @@ Small Kana Mappings</h2>
 	text-transform/text-transform-full-size-kana-007.html
 	</wpt>
 
-<h2 id="priv-sec" class="no-num">
-Privacy and Security Considerations</h2>
+<h2 id="priv" class="no-num">
+Privacy Considerations</h2>
 
 	<wpt title="Tests not needed for this section."></wpt>
 
-	This specification introduces no new security considerations.
-
 	This specification leaks the user’s installed hyphenation and line-breaking dictionaries.
 
+<h2 id="sec" class="no-num">
+Security Considerations</h2>
+
+	<wpt title="Tests not needed for this section."></wpt>
+
+	This specification introduces no new security considerations.
+
 <h2 class="no-num" id="acknowledgements">
 Acknowledgements</h2>