update sponsor doc

README.md

@@ -11,9 +11,9 @@
   <a href="https://workos.com/?utm_campaign=github_repo&utm_medium=referral&utm_content=frp&utm_source=github" target="_blank">
     <img width="350px" src="https://raw.githubusercontent.com/fatedier/frp/dev/doc/pic/sponsor_workos.png">
   </a>
-
+  <a>&nbsp</a>
   <a href="https://www.nango.dev?utm_source=github&utm_medium=oss-banner&utm_campaign=fatedier-frp" target="_blank">
-    <img width="350px" src="https://raw.githubusercontent.com/fatedier/frp/dev/doc/pic/sponsor_nango.png">
+    <img width="400px" src="https://raw.githubusercontent.com/fatedier/frp/dev/doc/pic/sponsor_nango.png">
   </a>
 </p>
 <!--gold sponsors end-->

README_zh.md

@@ -13,9 +13,9 @@ frp 是一个专注于内网穿透的高性能的反向代理应用，支持 TCP
   <a href="https://workos.com/?utm_campaign=github_repo&utm_medium=referral&utm_content=frp&utm_source=github" target="_blank">
     <img width="350px" src="https://raw.githubusercontent.com/fatedier/frp/dev/doc/pic/sponsor_workos.png">
   </a>
-
+  <a>&nbsp</a>
   <a href="https://www.nango.dev?utm_source=github&utm_medium=oss-banner&utm_campaign=fatedier-frp" target="_blank">
-    <img width="350px" src="https://raw.githubusercontent.com/fatedier/frp/dev/doc/pic/sponsor_nango.png">
+    <img width="400px" src="https://raw.githubusercontent.com/fatedier/frp/dev/doc/pic/sponsor_nango.png">
   </a>
 </p>
 <!--gold sponsors end-->