docs: update usage (#15142)

sgl-kernel/README.md

@@ -1,6 +1,6 @@
-# SGL Kernel
+# sgl-kernel
 
-[Kernel Library](https://github.com/sgl-project/sglang/tree/main/sgl-kernel) for SGLang
+[Kernel Library](https://github.com/sgl-project/sglang/tree/main/sgl-kernel) for LLM inference engines
 
 <div align="center">
 
@@ -9,7 +9,7 @@
 
 </div>
 
-SGL Kernel provides optimized compute primitives for the SGLang framework, enabling efficient inference for large language models and vision-language models through custom kernel operations.
+sgl-kernel provides optimized compute primitives for LLM inference engines, enabling efficient inference for large language models and vision-language models through custom kernel operations. It has been used by [LightLLM](https://github.com/ModelTC/LightLLM), [SGLang](https://github.com/sgl-project/sglang) and so on.
 
 ## Installation
 Requires torch == 2.9.1