Update changelog

CHANGELOG.md

 
+<a name="v1.6.0"></a>
+## [v1.6.0] - 2022-10-13
+### Code Refactoring
+- refactor the execute function, the execute function should not print messages
+
+
 <a name="v1.5.0"></a>
 ## [v1.5.0] - 2022-10-13
 ### Add Features
@@ -68,6 +74,7 @@
 <a name="v1.0.0"></a>
 ## v1.0.0 - 2022-10-04
 
+[v1.6.0]: https://gitlab.schukai.com/oss/libraries/go/application/xflags/compare/v1.5.0...v1.6.0
 [v1.5.0]: https://gitlab.schukai.com/oss/libraries/go/application/xflags/compare/v1.4.0...v1.5.0
 [v1.4.0]: https://gitlab.schukai.com/oss/libraries/go/application/xflags/compare/v1.3.1...v1.4.0
 [v1.3.1]: https://gitlab.schukai.com/oss/libraries/go/application/xflags/compare/v1.3.0...v1.3.1