[css-tables] Editorial fix

Author: FremyCompany

css-tables-3/Overview.bs

@@ -1000,7 +1000,7 @@ spec:css22; type:property; text:display
 				</ul>
 
 				<li>Harmonize the conflicting borders of S
-			</ul>
+			</ol>
 
 			<li>Resolve conflicts with border-bottom:
 			<ol start="0">
@@ -1030,7 +1030,7 @@ spec:css22; type:property; text:display
 					but is required for layout correctness.
 					<span class="hint">(see [[#drawing-collapsed-borders-2]])</span>
 				</div>
-		</ul>
+		</ol>
 
 		<b>Then, for that <a>table-root</a>:</b>