Update CHANGELOG.md

Author: wasabeef

CHANGELOG.md

@@ -1,12 +1,13 @@
 ## 4.1.3
 
 **Bug fix**  
-[#172](https://github.com/FlutterGen/flutter_gen/pull/172) [#173](https://github.com/FlutterGen/flutter_gen/pull/173) Add unnecessary_import in ignore_for_title because cause warning from Dart 2.15.
+- [#172](https://github.com/FlutterGen/flutter_gen/pull/172) [#173](https://github.com/FlutterGen/flutter_gen/pull/173) Add unnecessary_import in ignore_for_title because cause warning from Dart 2.15.
 
 ## 4.1.2+1, 4.1.2+2
 
-**Development**
-Added sample code.
+**Development**  
+- Added sample code.
+
 ## 4.1.2
 
 **Bug fix**