fix: code error

Author: XiaJunjie2020

backend/alembic/env.py

@@ -27,7 +27,7 @@
 # from apps.system.models.user import SQLModel  # noqa
 # from apps.settings.models.setting_models import SQLModel
 #from apps.chat.models.chat_model import SQLModel
-from apps.dashboard.models.dashboard import SQLModel
+from apps.dashboard.models.dashboard_model import SQLModel
 from common.core.config import settings # noqa
 
 target_metadata = SQLModel.metadata