[css-align-3] Update Changes list

Author: fantasai

css-align-3/Overview.bs

@@ -2401,8 +2401,12 @@ Changes</h2>
 		(<a href="https://github.com/w3c/csswg-drafts/issues/5088">Issue 5088</a>)
 		<li>Various corrections to <css>normal</css> alignment and percentage gaps
 		to match respective layout specs.
-		<li>Corrections to special handling of [=last baseline set=] of [=scroll containers=].
+		<li>Corrections to special legacy handling of the [=last baseline set=] of [=scroll containers=].
 		(<a href="https://github.com/w3c/csswg-drafts/issues/3611">Issue 3611</a>)
+		<li>Clarify that a box with no [=baseline set=] synthesizes its [=alignment baseline=] as needed.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/3611">Issue 3611</a>)
+		<li>Clarified that only non-replaced boxes are affected by [=content-alignment].
+		(<a href="https://github.com/w3c/csswg-drafts/issues/4545">Issue 4545</a>)
 	</ul>
 
 	Changes since the <a href="https://www.w3.org/TR/2018/WD-css-align-3-20181206/">6 December 2018 Working Draft</a> include: