(docs): Update last updated date and add client implementor interest group members in MAINTAINERS.md

Author: olaservo

MAINTAINERS.md

@@ -2,7 +2,7 @@
 
 This document lists current maintainers in the Model Context Protocol project.
 
-**Last updated:** August 17, 2025
+**Last updated:** October 15, 2025
 
 ## Lead Maintainers
 
@@ -127,9 +127,14 @@ This document lists current maintainers in the Model Context Protocol project.
 
 ### Client Implementor Interest Group
 
-- [Michael Feldstein](https://github.com/msfeldstein)
-- [Harald Kirschner](https://github.com/digitarald)
-- [Connor Peet](https://github.com/connor4312)
+**Note:** These individuals serve as MCP protocol representatives for their respective clients. For client-specific issues, use the official support channels provided by each product.
+
+- [Alex Hancock](https://github.com/alexhancock) - Goose
+- [Connor Peet](https://github.com/connor4312) - VS Code
+- [Gabriel Peal](https://github.com/gpeal) - Codex
+- [Harald Kirschner](https://github.com/digitarald) - VS Code
+- [Jun Han](https://github.com/formulahendry) - GitHub Copilot for JetBrains
+- [Michael Feldstein](https://github.com/msfeldstein) - Cursor
 
 ### Financial Services Interest Group