Add changelog entry for override parameter default change

Co-authored-by: FlorentinD <[email protected]>

Author: Copilot

changelog.md

@@ -3,6 +3,7 @@
 ## Breaking changes
 
 * Removed `table` property from nodes and relationships returned from `from_snowflake`, the table is represented by the `caption` field.
+* Changed default value of `override` parameter in `VisualizationGraph.color_nodes()` from `False` to `True`. The method now overrides existing node colors by default. To preserve existing colors, explicitly pass `override=False`.
 
 ## New features