chore: Format agent code (#1077)

dbgpt/serve/agent/db/gpts_manage_db.py

@@ -1,13 +1,13 @@
 from datetime import datetime
 
 from sqlalchemy import (
+    Boolean,
     Column,
     DateTime,
     Integer,
     String,
     Text,
     UniqueConstraint,
-    Boolean,
 )
 
 from dbgpt.storage.metadata import BaseDao, Model