Fix env. variable call

.github/package.py

@@ -9,10 +9,11 @@ def get_folder_name():
 
 
 if __name__ == "__main__":
+    env_file = os.getenv('GITHUB_ENV')
     name = get_folder_name()
     print(f'Python : The folder name find are "{name}"')
 
-    with open('$GITHUB_ENV', 'w') as f:
+    with open(env_file, 'a') as f:
         f.write(f'APP_NAME={name}')
         f.write(f'NAME_PACKAGE={name}.zip')
         print('Update all env. variable')