Update CHANGES.txt

Conengmo · web-flow · commit 0258f99fc7cd · 2023-12-04T14:13:28.000+01:00
diff --git a/CHANGES.txt b/CHANGES.txt
@@ -5,6 +5,10 @@ New features
 
 -  Use xyzservices instead of templates for tiles (@martinfleis #1827)
 
+Improvements
+
+- Add TimeSliderChoropleth stroke colour/width/opacity argument (@yutemi #1838) 
+
 Bug fixes
 
 -  Fix streamlit-folium compatibility (add layer to map with new class) (@Conengmo #1834)
