Revert version to 10.3.8

Updates `pubspec.yaml` and `CHANGELOG.md` to revert the version from 10.3.9 to 10.3.8.

Author: vicajilau

CHANGELOG.md

@@ -1,8 +1,6 @@
-## 10.3.9
+## 10.3.8
 ### iOS
 - Rename FileUtils to FilePickerUtils [#1921](https://github.com/miguelpruivo/flutter_file_picker/issues/1921)
-
-## 10.3.8
 ### Android
 - Restores the ms[df] URI handling logic in FileUtils.kt to fix file selection returning null on some devices.
 

pubspec.yaml

@@ -3,7 +3,7 @@ description: A package that allows you to use a native file explorer to pick sin
 homepage: https://github.com/miguelpruivo/plugins_flutter_file_picker
 repository: https://github.com/miguelpruivo/flutter_file_picker
 issue_tracker: https://github.com/miguelpruivo/flutter_file_picker/issues
-version: 10.3.9
+version: 10.3.8
 
 dependencies:
   flutter: