[css-tables] correcting li positioning in algo

Author: Greg Whitworth

css-tables-3/Overview.bs

@@ -1675,6 +1675,7 @@ spec:css21; type:property; text:max-width
 							<ul>
 								<li>its intrinsic percentage width times the assignable width and
 								<li>its min-content width
+							</ul>
 
 						<li>all other columns are assigned their max-content width.
 					</ul>