Update changelog

Changelog.md

@@ -2,6 +2,12 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.42] - 2023-11-27
+- Added filtering to remove invalid budget and funding sources data
+- Updated funding source graph to have static 0-100% x-axes
+- Removed legend from the budget graph
+- Added new buttons for downloading CSV/excel data as well as graph images
+
 ## [0.39] - 2023-10-19
 - Removed filtering in publishers to show bad data
 - Refactored parts of the data conversion module for building graph datasets