[skip ci] Add comments of run suite on benchmark (#9279)

Signed-off-by: wangting0128 <ting.wang@zilliz.com>

tests/benchmark/milvus_benchmark/main.py

@@ -46,6 +46,7 @@ def get_image_tag(image_version):
 def run_suite(run_type, suite, env_mode, env_params, timeout=None):
     try:
         start_status = False
+        # Initialize the class of the reported metric
         metric = api.Metric()
         deploy_mode = env_params["deploy_mode"]
         deploy_opology = env_params["deploy_opology"] if "deploy_opology" in env_params else None