[MISC] Fix invalid escape sequence '\'

Signed-off-by: Peter Pan <Peter.Pan@daocloud.io>

benchmarks/benchmark_serving.py

@@ -15,7 +15,7 @@
         --model <your_model> \
         --dataset-name sharegpt \
         --dataset-path <path to dataset> \
-        --request-rate <request_rate> \ # By default <request_rate> is inf
+        --request-rate <request_rate> \# By default <request_rate> is inf
         --num-prompts <num_prompts> # By default <num_prompts> is 1000
 
     when using tgi backend, add
@@ -963,4 +963,4 @@ def main(args: argparse.Namespace):
     )
 
     args = parser.parse_args()
-    main(args)
+    main(args)