Merge pull request #915 from OptimalScale/yizhenjia-readme-upd

[doc] update default branch

Author: research4pan

README.md

@@ -107,7 +107,7 @@ Our package has been tested on Linux OS (Ubuntu 20.04). Other OS platforms (MacO
 CUDA versions 10.3-11.7 are supported in versions `v0.0.5` or older. For CUDA versions greater than 11.7, one can use our stable branch `>= v0.0.6`.
 
 ```bash
-git clone https://github.com/OptimalScale/LMFlow.git
+git clone -b v0.0.9 https://github.com/OptimalScale/LMFlow.git
 cd LMFlow
 conda create -n lmflow python=3.9 -y
 conda activate lmflow