update the readme

README.md

@@ -6,6 +6,9 @@ A ChatGPT web client that supports multiple users, multiple languages, and multi
 
 The server of this project：[https://github.com/WongSaang/chatgpt-ui-server](https://github.com/WongSaang/chatgpt-ui-server)
 
+## Special sponsors
+- [Aissts](https://aissts.com/) - Support multiple types of robots, Pay as you go, no need for high subscription fees. Register now for a chance to get free credit.
+
 ## Documentation
 - [English](https://wongsaang.github.io/chatgpt-ui/)
 - [中文](https://wongsaang.github.io/chatgpt-ui/zh/)

docs/README.md

@@ -3,6 +3,9 @@
 
 ChatGPT UI is an unofficial ChatGPT web client. It supports multiple users, multiple languages, and multiple database connections for persistent data storage, such as Mysql, PostgreSQL, and Sqlite.
 
+## Special sponsors
+- [Aissts](https://aissts.com/) - Support multiple types of robots, Pay as you go, no need for high subscription fees. Register now for a chance to get free credit.
+
 This project consists of two parts, the client-side and the server-side:
 
 - Client-side, based on [Nuxt](https://nuxt.com/), project address: [https://github.com/WongSaang/chatgpt-ui](https://github.com/WongSaang/chatgpt-ui)

docs/zh/README.md

@@ -2,6 +2,9 @@
 
 ChatGPT UI 是一个非官方的 ChatGPT Web 客户端。它支持多用户，多语言，多种数据库连接进行数据持久化存储，例如：Mysql、PostgreSQL 和 Sqlite 等。
 
+## 特别赞助
+- [Aissts](https://aissts.com/) - 支持多种类型的机器人，提供灵活的按需支付方式，无需高额订阅费。现在注册有机会获得免费额度。
+
 本项目项目包括客户端和服务端两部分。
 
 - 客户端，基于 [Nuxt](https://nuxt.com/)，项目地址：[https://github.com/WongSaang/chatgpt-ui](https://github.com/WongSaang/chatgpt-ui)