Improve Changelog.md

Co-Authored-By: Richard van Laak <rvanlaak@gmail.com>

Author: Olivier Dolbeau

Changelog.md

@@ -6,7 +6,7 @@ The change log describes what is "Added", "Removed", "Changed" or "Fixed" betwee
 
 ## 2.0.0
 
-- Remove legacy layer used to support Symfony ^2.0
+- Drop `symfony/translation` < 3.4 support by removing legacy layer
 - Add strict type hinting
 
 ## 1.1.0
@@ -113,4 +113,3 @@ to support legacy code.
 
 Init release
 
-