The action is no longer exit when dart or flutter binary not foun…

…d but warning instead

action.sh

@@ -5,10 +5,11 @@ if [[ -z "${ACTIONS_ID_TOKEN_REQUEST_URL}" ]] && [[ -z "${ACTIONS_ID_TOKEN_REQUE
     exit 0
 fi
 
-if [ ! "$(command -v dart)" ] && [ ! "$(command -v flutter)" ]; then
-    echo "::error::Flutter is not installed,"
-    echo "See https://github.com/flutter-actions/setup-flutter for more details."
-    exit 1
+if [ ! "$(command -v dart)" ]; then
+    echo '::warning title=Dark is not installed::Please use "uses: dart-lang/setup-dart@v1" or "uses: flutter-actions/setup-flutter@v4" to setup Dart or Flutter SDK.'
+fi
+if  [ ! "$(command -v flutter)" ]; then
+    echo '::warning title=Flutter is not installed::Please use "uses: flutter-actions/setup-flutter@v4" to setup Dart & Flutter SDK.'
 fi
 
 INPUT_GITHUB_OIDC_AUDIENCE="https://pub.dev"