fix mdformat

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

Author: tukwila

docs/examples/benchmark_practice_on_drun.md

@@ -55,7 +55,7 @@ Download the chat dataset JSON file `Open-Source-Meeseeks-high-quality.json` fro
 
 ![alt text](image-3.png)
 
----
+______________________________________________________________________
 
 ## 🚀 2. Running Benchmarks
 
@@ -70,16 +70,16 @@ guidellm benchmark \
  --data "/{$local_path}/Open-Source-Meeseeks-high-quality.json"
 ```
 
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+______________________________________________________________________
 
 ## 📊 3. Results Interpretation
 
 ![alt text](image-4.png)
 
 After the benchmark completes, key results are clear and straightforward, such as:
 
-* **`TTFT`**: Time to First Token
-* **`TPOT`**: Time Per Output Token
-* **`ITL`**: Inter-Token Latency
+- **`TTFT`**: Time to First Token
+- **`TPOT`**: Time Per Output Token
+- **`ITL`**: Inter-Token Latency
 
-The first benchmark test is complete.
+The first benchmark test is complete.