MCP Server VSCode code example incorrect property tag

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Which topic?

https://developer.adobe.com/express/add-ons/docs/guides/getting_started/local_development/mcp_server/

### What's wrong with the content?

"mcpServer" should be "servers".
[Microsoft Doc](https://developer.adobe.com/express/add-ons/docs/guides/getting_started/local_development/mcp_server/)

### What changes do you propose?

Change mcpServer to servers

### Anything else that can help to cover this?

_No response_

Open the MCP Server local development guide at the linked documentation URL and locate the VSCode code example containing the mcpServer property. Change that property name to servers, then review the rendered example to confirm the corrected tag is shown.

Written by the indexing model from the issue text.