Fixed a typo

frontend/scripts/makefile/flutter.toml

@@ -177,7 +177,7 @@ script_runner = "@shell"
 [tasks.generate_language_files]
 script_runner = "@shell"
 script = [
-  '''
+  """
   cd app_flowy
   flutter clean
   flutter pub get
@@ -190,13 +190,11 @@ script = [
 [tasks.generate_language_files.windows]
 script_runner = "@duckscript"
 script = [
-  '''
-  cd app_flowy
+  """
+  cd ./app_flowy/
   exec cmd.exe /c flutter clean
   exec cmd.exe /c flutter pub get
   exec cmd.exe /c flutter pub run easy_localization:generate -S assets/translations/
   exec cmd.exe /c flutter pub run easy_localization:generate -f keys -o locale_keys.g.dart -S assets/translations
-  '''
+  """
 ]
-
-