[css-syntax] Add the listing of Encoding to changes.

Author: SimonSapin

css-syntax/Overview.html

@@ -4690,6 +4690,10 @@ <h3 class="heading settled heading" data-level=10.1 id=changes-WD-20131105><span
 			to make only the "round-trip" requirement normative,
 			and move the details of how to achieve it into a note.
 			Some corner cases in these details have been fixed.
+		<li>
+			<a data-biblio-type=informative data-link-type=biblio href=#encoding title=encoding>[ENCODING]</a> has been added to the list of normative references.
+			It was already referenced in normative text before,
+			just not listed as such.
 	</ul>
 
 <h3 class="heading settled heading" data-level=10.2 id=changes-WD-20130919><span class=secno>10.2 </span><span class=content>

css-syntax/Overview.src.html

@@ -3216,6 +3216,10 @@ <h3 id="changes-WD-20131105">
 			to make only the "round-trip" requirement normative,
 			and move the details of how to achieve it into a note.
 			Some corner cases in these details have been fixed.
+		<li>
+			[[ENCODING]] has been added to the list of normative references.
+			It was already referenced in normative text before,
+			just not listed as such.
 	</ul>
 
 <h3 id="changes-WD-20130919">