chore: update README.md

README.md

@@ -21,6 +21,7 @@ Yet another Nginx Web UI, developed by [0xJacky](https://jackyu.cn/) and [Hintay
 [![Translated Status](https://weblate.nginxui.com/widget/nginx-ui/frontend/svg-badge.svg)](https://weblate.nginxui.com/engage/nginx-ui/)
 [![Featured｜HelloGitHub](https://abroad.hellogithub.com/v1/widgets/recommend.svg?rid=86f3a8f779934748a34fe6f1b5cd442f&claim_uid=MOFqadzAShCBeQj&theme=small)](https://hellogithub.com/repository/86f3a8f779934748a34fe6f1b5cd442f)
 
+<iframe src="https://github.com/sponsors/nginxui/card" title="Sponsor Nginx UI" height="225" width="600" style="border: 0;"></iframe>
 
 ## Documentation
 To check out docs, visit [nginxui.com](https://nginxui.com).