Fix typos: retrievaler -> retriever (#10372)

### What problem does this PR solve?

Fix typos

### Type of change

- [x] Refactoring

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

admin/responses.py

@@ -1,15 +1,34 @@
+#
+#  Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+
+
 from flask import jsonify
 
-def success_response(data=None, message="Success", code = 0):
+
+def success_response(data=None, message="Success", code=0):
     return jsonify({
         "code": code,
         "message": message,
         "data": data
     }), 200
 
+
 def error_response(message="Error", code=-1, data=None):
     return jsonify({
         "code": code,
         "message": message,
         "data": data
-    }), 400
+    }), 400