Add new contributors so they can trigger CI automatically (#2269)

Co-authored-by: Qun Yang <qun.yang@intel.com>
Co-authored-by: zhengy001 <zhengy.gator@gmail.com>
Co-authored-by: HandH1998 <1335248067@qq.com>
Co-authored-by: xiaobo <xiaob.chen@outlook.com>

sgl-kernel/README.md

-# sgl-kernel
+# SGL Kernel
 
 Kernel Library for SGLang