[css-fonts-3] update changes section

Author: svgeesus

css-fonts-3/Fonts.src.html

@@ -1646,10 +1646,11 @@ <h3 id="src-desc">Font reference: the <a href="#descdef-src">src</a> descriptor<
 the user agent should download the font resource.</p>
 
 <pre>
-/* load WOFF font if possible, otherwise use OpenType font */
+/* load WOFF2 font if possible, otherwise WOFF, else use OpenType font */
 @font-face {
   font-family: bodytext;
-  src: url(ideal-sans-serif.woff) format("woff"),
+  src: url(ideal-sans-serif.woff2) format("woff2"),
+       url(good-sans-serif.woff) format("woff"),
        url(basic-sans-serif.ttf) format("opentype");
 }
 </pre>
@@ -4470,7 +4471,15 @@ <h2 id="platform-props-to-css" class="no-num">Appendix A: Mapping platform font
 under Mac OS X.</p>
 
 <h2 class="no-num" id="ch-ch-ch-changes">Changes</h2>
-  <h3 class="no-num" id="recent-changes">
+
+<h3 class="no-num" id="recent-changes">
+  Changes from the <a href="https://www.w3.org/TR/2018/CR-css-fonts-3-20180315/">March 15 2018 CSS Fonts 3 Candidate Recommendation</a></h3>
+
+  <ul>
+    <li>'font-variant' descriptor moved to Fonts 4 due to lack of implementations</li>
+  </ul>
+
+  <h3 class="no-num" id="less-recent-changes">
   Changes from the <a href="https://www.w3.org/TR/2013/CR-css-fonts-3-20131003/">October 2013 CSS3 Fonts Candidate Recommendation</a></h3>
 
   <ul>