[css-ruby] Fix bikeshed use of <var>

Author: frivoal

css-ruby-1/Overview.bs

@@ -15,7 +15,6 @@ Editor: Xidorn Quan, Mozilla https://www.mozilla.org/, https://www.upsuper.org/,
 Abstract: “Ruby”, a form of interlinear annotation, are short runs of text alongside the base text.
 Abstract: They are typically used in East Asian documents to indicate pronunciation or to provide a short annotation.
 Abstract: This module describes the rendering model and formatting controls related to displaying ruby annotations in CSS.
-Ignored vars: any
 </pre>
 
 <!--
@@ -315,7 +314,7 @@ Anonymous Ruby Box Generation</h3>
 				<tr><th>Previous box
 				    <th>Next box
 			<tbody>
-				<tr><td><var>any</var>
+				<tr><td><i>any</i>
 				    <td><i>ruby annotation container</i>
 				<tr><td>not <i>ruby annotation</i>
 				    <td><i>ruby annotation</i>