Update README.md

README.md

@@ -71,7 +71,7 @@ We recommend using this model with [vLLM](https://github.com/vllm-project/vllm).
 Make sure to install vllm from "main":
 
 ```
-pip install -U vllm[audio] \
+pip install -U vllm\[audio\] \
     --pre \
     --extra-index-url https://wheels.vllm.ai/nightly 
 ```