Updated ChangeLog

Changelog.md

 # Changelog
 
+## [0.13] - 2025-07-10
+- Improved performane for the validation process 
+- Applied some cosmatic changes in order to have a better user experience
+- Added a information box of tax details after validation is successful
+
 ## [0.12] - 2025-04-30
 - Changed NC-CC-DEP validation. The validator skips validation when all NC, CC and DEP are missing 
 
@@ -20,7 +25,7 @@
 - Added cheque validation
 - Added sphinx docs
 - Improved error messages
-- Improve the upload page GUI
+- Improved the upload page GUI
 - Fixed bugs in validation form reported by Finance
 
 ## [0.6] - 2025-03-14