Update CHANGELOG.md

Author: tabacitu

CHANGELOG.md

@@ -20,6 +20,12 @@ All Notable changes to `Backpack CRUD` will be documented in this file
 - Nothing
 
 
+## [3.1.12] - 2016-09-19
+
+### Added
+- French translation, thanks to [7ute](https://github.com/7ute);
+
+
 ## [3.1.11] - 2016-09-19
 
 ### Added