[css-scrollbars] Editorial: silence bikshed warning

Author: frivoal

css-scrollbars-1/Overview.bs

@@ -340,7 +340,7 @@ Changes from the <a href="https://www.w3.org/TR/2018/WD-css-scrollbars-1-2018092
 	</ul>
 
 <h2 class="no-num" id="security-privacy-considerations">
-Appendix C. Considerations for Security and Privacy</h2>
+Appendix C. Security and Privacy</h2>
 
 	This appendix is <em>non-normative</em>.