Update SGLang guide (#14)

- Update SGLang guide (e85ed67926ee68acc2c9259b5f41d6b524fe602a)


Co-authored-by: Xinyuan Tong <JustinTong@users.noreply.huggingface.co>

README.md

@@ -59,7 +59,12 @@ pip install git+https://github.com/huggingface/transformers.git
 
 ### SGLang
 
-+ using pip install sglang from source, then update transformers to the latest main branch.
++ Install the supported versions of SGLang and Transformers (using `uv` is recommended):
+
+```shell
+uv pip install sglang==0.3.2.dev9039+pr-17247.g90c446848 --extra-index-url https://sgl-project.github.io/whl/pr/
+uv pip install git+https://github.com/huggingface/transformers.git@76732b4e7120808ff989edbd16401f61fa6a0afa
+```
 
 ### transformers
 
@@ -126,6 +131,7 @@ python3 -m sglang.launch_server \
   --host 0.0.0.0 \
   --port 8000
 ```
++ For Blackwell GPUs, include `--attention-backend triton --speculative-draft-attention-backend triton` in your SGLang launch command.
 
 ## Citation