update

ios/Flutter/flutter_export_environment.sh

+#!/bin/sh
+# This is a generated file; do not edit or check into version control.
+export "FLUTTER_ROOT=C:\src\flutter_windows_1.20.1-stable\flutter"
+export "FLUTTER_APPLICATION_PATH=F:\flutterUdemyCourse\Fl\DMTMAIN_flutter_app"
+export "FLUTTER_TARGET=lib\main.dart"
+export "FLUTTER_BUILD_DIR=build"
+export "SYMROOT=${SOURCE_ROOT}/../build\ios"
+export "OTHER_LDFLAGS=$(inherited) -framework Flutter"
+export "FLUTTER_FRAMEWORK_DIR=C:\src\flutter_windows_1.20.1-stable\flutter\bin\cache\artifacts\engine\ios"
+export "FLUTTER_BUILD_NAME=1.0.0"
+export "FLUTTER_BUILD_NUMBER=1"
+export "DART_OBFUSCATION=false"
+export "TRACK_WIDGET_CREATION=false"
+export "TREE_SHAKE_ICONS=false"
+export "PACKAGE_CONFIG=.packages"