Update serializers.js

Co-authored-by: Chemi Atlow <chemi@atlow.co.il>

Author: mertcanaltin

lib/internal/logger/serializers.js

@@ -82,6 +82,7 @@ function req(req) {
  */
 function res(res) {
   return {
+    __proto__: null,
     statusCode: res.statusCode,
     headers: res.getHeaders?.() ?? res.headers,
   };