[css-vaues-4] Update changes

Author: fantasai

css-values-4/Overview.bs

@@ -5190,7 +5190,9 @@ Recent Changes</h3>
 	(This is a subset of [[#additions-L3]].)
 
 	Substantial changes since <a href="https://www.w3.org/TR/2023/WD-css-values-4-20231027/">287 October 2023 WD</a>:
-	* Pinned the [=default viewport units=] to the [=large viewport units=], given existing interoperability.
+	* Pinned the [=default viewport units=] to the [=large viewport units=]--
+		despite violation of the “avoid dataloss by default principle”--
+		given existing interoperability and presumed Web-compat restriction.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/6454">Issue 6452</a>)
 
 	Substantial changes since <a href="https://www.w3.org/TR/2023/WD-css-values-4-20230406/">6 April 2023 WD</a>: