Merge pull request #1931: Add changelog entry for new warning banner

CHANGELOG.md

@@ -5,6 +5,10 @@ Clicking on a group in the measurements panel will add a new coloring to the tre
 where the colors represent an average of the measurement values for the matching
 test strain within the selected measurements group.
 For full details, please see [#1924](https://github.com/nextstrain/auspice/pull/1924).
+* Dataset authors can display a warning banner at the top of the page by setting `.meta.warning` in the main dataset JSON.
+  The warning can be plain text or markdown format.
+  This can be incorporated into Nextstrain workflows using `augur export v2 --warning`, available as of Augur version 27.2.0.
+  ([#1927](https://github.com/nextstrain/auspice/issues/1927))
 * Bugfix: Clicking on the icons for FULL and GRID layout now changes the layout, just like clicking on the text ([#1911](https://github.com/nextstrain/auspice/issues/1911))
 
 ## version 2.61.2 - 2024/11/19