Fix cloud quickstart and image links

Author: saqadri

docs/cloud/authentication/overview.mdx

@@ -17,7 +17,7 @@ mcp-agent cloud supports multiple authentication modes so you can choose the rig
 | **Secrets service** | Stores deployment/user secrets, eliminating the need to embed credentials in clients. |
 
 <img
-  src="https://github.com/user-attachments/assets/dcb9638c-0da2-4920-bb93-4fb59c92ca06"
+  src="https://github.com/user-attachments/assets/80d63b71-d9ba-46a0-b2a6-8ccf1bfb6296"
   alt="Agents exposed as MCP servers, sitting between MCP clients and downstream MCP servers"
   width="593"
   height="406"