[css-contain] Bikeshed fixes

Author: frivoal

css-contain-1/Overview.bs

@@ -19,6 +19,7 @@ Editor: Florian Rivoal, On behalf of Bloomberg, https://florian.rivoal.net/, w3c
 Abstract: This CSS module describes the 'contain' property, which indicates that the element's subtree is independent of the rest of the page. This enables heavy optimizations by user agents when used well.
 Status Text: A <a href="https://drafts.csswg.org/css-contain-1/issues-2019-cr.html">Disposition of Comments</a> and an <a href="https://drafts.csswg.org/css-contain-1/implementation-report-2019-09">Implementation Report</a> are available.
 WPT Path Prefix: css/css-contain/
+Include MDN Panels: no
 </pre>
 <pre class="anchors">
 spec: css2; urlPrefix: https://www.w3.org/TR/CSS2/
@@ -38,6 +39,7 @@ spec:css-break-3; type:dfn; text:fragmentation
 spec:css-break-3; type:dfn; text:fragmentation container
 spec:css-break-3; type:dfn; text:fragmentation context
 spec:css-break-3; type:dfn; text:fragmented flow
+spec:css2; type:value; property: height; text:auto
 </pre>
 
 <h2 id='intro'>