[Docs] Remove POST method from MCP server URL

Author: joaquim-verges

apps/portal/src/app/ai/mcp/page.mdx

@@ -9,7 +9,7 @@ You can use the thirdweb MCP server to interact with the thirdweb API from your
 You can access the MCP server at the following url, with your project secret key.
 
 ```http
-POST https://api.thirdweb.com/mcp?secretKey=<your-project-secret-key>
+https://api.thirdweb.com/mcp?secretKey=<your-project-secret-key>
 ```
 
 Make sure to keep your secret key safe and never share it with anyone.