fix: change user role to a list for compatibility with role relations

Author: wxg0103

apps/users/serializers/user.py

@@ -90,7 +90,7 @@ def profile(user: User, auth: Auth):
         """
         workspace_list = get_workspace_list_by_user(user.id)
         user_role_relation_model = DatabaseModelManage.get_model("workspace_user_role_mapping")
-        role_name = user.role
+        role_name = [user.role]
         if user_role_relation_model:
             user_role_relations = (
                 user_role_relation_model.objects