add max isbey as python sdk maintainer

Author: dsp-ant

MAINTAINERS.md

@@ -60,6 +60,7 @@ This document lists current maintainers in the Model Context Protocol project.
 - [Jerome Swannack](https://github.com/jerome3o)
 - [Samuel Colvin](https://github.com/samuelcolvin)
 - [Marcelo Trylesinski](https://github.com/Kludex)
+- [Max Isbey](https://github.com/maxisbey)
 
 ### TypeScript SDK