build(deps): bump github.com/modelcontextprotocol/go-sdk from 1.5.1-0.20260403154220-27f29c1cef3b to 1.6.0

build(deps): bump github.com/modelcontextprotocol/go-sdk from 1.5.1-0.20260403154220-27f29c1cef3b to 1.6.0 #5164