[css-grid-3] Update Changes section.

Author: fantasai

css-grid-3/Overview.bs

@@ -1515,13 +1515,15 @@ Recent Changes</h3>
 	The following changes have been made since the
 	<a href='https://www.w3.org/TR/2025/WD-css-grid-3-20250917/'>17 September 2025 Working Draft</a>:
 
-	* Defined a new inner display type, ''display/grid-lanes'', to establish [=grid lanes layout=].
+	* Defined a new inner display type, ''display/grid-lanes'', to establish [=grid lanes layout=],
+		and updated spec vocabulary to match.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/12022">Issue 12022</a>)
 	* Dropped the unnecessary <css>auto-areas</css> value from ''repeat()''.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/10854">Issue 10854</a>)
 	* Adjusted heuristic for ''repeat(auto-fill)'' and ''repeat(auto-fit)'' with indefinite track sizing functions.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/12899">Issue 12899</a>)
-
+	* Floored the contribution of items to a track's [=running position=] at zero.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/12918">Issue 12918</a>)
 
 	See also <a href="https://www.w3.org/TR/2025/WD-css-grid-3-20250917/#recent-changes">earlier changes</a>.