[css-multicol] fixing bikeshed issue

Author: rachelandrew

css-multicol/Overview.bs

@@ -1738,7 +1738,7 @@ This appendix describes changes from the
 <ul>
 	<li>Added July 1016 resolution to change the the track size floor to a required UA-specified value, consistent with the CSS Grid spec.
     <li>Remove the restriction about overflow columns only being in continuous media in the statement that 'column-fill' has no effect on overflow columns. <a href="https://lists.w3.org/Archives/Public/www-style/2013Sep/0471.html">Resolved: September 2013</a>.
-	<li>Added keyword 'balance-all' and examples to demonstrate how this should work. <a href="https://lists.w3.org/Archives/Public/www-style/2013Sep/0471.html">Resolved: September 2013</a>.
+	<li>Added keyword balance-all and examples to demonstrate how this should work. <a href="https://lists.w3.org/Archives/Public/www-style/2013Sep/0471.html">Resolved: September 2013</a>.
 	<li> The pseudo-algorithm has been revised on a number of occasions. <a href="https://lists.w3.org/Archives/Public/www-style/2013Feb/0471.html">Latest change Feb 2013</a>.
 	<li>Clarified that properties 'columns', 'column-width', 'column-count' "apply to block containers". <a href="https://lists.w3.org/Archives/Public/www-style/2013Feb/0536.html">Ref: Feb 2013</a>.
 	<li>Breaking properties have beeen moved from this specification to the <a href="https://www.w3.org/TR/css-break-3/">CSS Fragmentation Module</a>.