[css-flexbox] Add to changes.

--HG--
extra : rebase_source : cad00b9a567f7c88834c9701ef0d3b0150795566

Author: tabatkins

css-flexbox/Overview.html

@@ -2762,6 +2762,8 @@ <h2 class="no-num heading settled heading" id=changes><span class=content>Change
 			(This was already stated in the <a class=property data-link-type=propdesc href=#propdef-order title=order>order</a> section, but not in the section explicitly about painting order.)
 		<li>
 			Clarified where zero-main-size flex items go when they’re at the end of a line.
+		<li>
+			Clarified that flex container cross sizes are still clamped by the flex container’s min/max properties.
 	</ul>
 
 	<p>A <a href=http://dev.w3.org/csswg/css3-flexbox/issues-cr-2012>Disposition of Candidate Recommendation Comments</a> is available.

css-flexbox/Overview.src.html

@@ -2795,6 +2795,8 @@ <h2 class="no-num" id="changes">Changes</h2>
 			(This was already stated in the 'order' section, but not in the section explicitly about painting order.)
 		<li>
 			Clarified where zero-main-size flex items go when they're at the end of a line.
+		<li>
+			Clarified that flex container cross sizes are still clamped by the flex container's min/max properties.
 	</ul>
 
 	<p>A <a href="http://dev.w3.org/csswg/css3-flexbox/issues-cr-2012">Disposition of Candidate Recommendation Comments</a> is available.