format md file

Signed-off-by: guangli.bao <[email protected]>

Author: tukwila

docs/examples/benchmark_practice_on_drun.md

@@ -20,6 +20,7 @@ git clone https://github.com/vllm-project/guidellm.git
 cd guidellm
 pip install guidellm
 ```
+
 For the more detail instruction, refer to https://github.com/vllm-project/guidellm/blob/main/README.md
 
 ### 1.3 Verify Installation
@@ -53,7 +54,6 @@ Download chat dataset json file Open-Source-Meeseeks-high-quality.json from http
 
 ![alt text](image-3.png)
 
-
 ## 🚀 2. Running Benchmarks
 
 ```bash