[css-overflow-3] Update metadata

Author: fantasai

css-overflow-3/Overview.bs

@@ -1,7 +1,7 @@
 <pre class="metadata">
 Title: CSS Overflow Module Level 3
 Status: ED
-Work Status: Revising
+Work Status: Refining
 ED: https://drafts.csswg.org/css-overflow-3/
 Shortname: css-overflow
 Group: csswg
@@ -42,9 +42,12 @@ Status Text:
 <!-- - Abstract has the most introductory sentence last -->
 <!-- FIXME: other bikeshed issues -->
 <pre class="link-defaults">
+spec:html; type:element; text:body
 spec:css-transforms-2; type:property; text:transform-style
 type: dfn; spec:css-multicol-1; text:overflow column
 type: dfn; spec:css-transforms-2; text:3d rendering context
+spec:css-backgrounds-3; type:property; text:box-shadow
+spec:css-backgrounds-3; type:property; text:border-radius
 spec:css-writing-modes-4; type:dfn; text:end
 spec:css-pseudo-4; type:selector; text:::first-line
 spec:css-pseudo-4; type:selector; text:::first-letter