[css-sizing] Update changes section

Author: fantasai

css-sizing-3/Overview.bs

@@ -10,7 +10,7 @@ TR: https://www.w3.org/TR/css3-sizing/
 Editor: Tab Atkins, Google, http://xanthir.com/contact/
 Editor: Elika J. Etemad / fantasai, Invited Expert, http://fantasai.inkedblade.net/contact
 !Issue Tracking: <a href="https://www.w3.org/Bugs/Public/buglist.cgi?product=CSS&amp;component=Sizing&amp;resolution=---">W3C Bugzilla</a>
-Previous version: https://www.w3.org/TR/2012/WD-css3-sizing-20120927/
+Previous version: https://www.w3.org/TR/2016/WD-css-sizing-3-20160512/
 Abstract: This module extends the CSS sizing properties with keywords that represent content-based "intrinsic" sizes and context-based "extrinsic" sizes, allowing CSS to more easily describe boxes that fit their content or fit into a particular layout context.
 Ignored Terms: block-level box
 </pre>
@@ -446,11 +446,10 @@ Fill-available Sizing</h3>
 Changes</h2>
 
 	<p>
-		Changes since the INSERT DATED DRAFT HERE AFTER PUBLISHING A NEW OLD ONE.
+		Changes since the <a href="https://www.w3.org/TR/2016/WD-css-sizing-3-20160512/">12 May 2016 Working Draft</a>:
 
 	<ul>
-		<li>Removed normative definitions of the various sizes, deferring to CSS2.1's “undefined” for floats.
-		(We will restore these details in a Level 4 draft.)
+		<li>Updated definition of <a>definite</a> to allow measurements against text content, per WG resolution.
 	</ul>
 
 <h2 class=no-num id="acknowledgments">