[skip ci] Update comments of parser on benchmark (#13423)

Signed-off-by: Nwangting0128 <ting.wang@zilliz.com>

tests/benchmark/milvus_benchmark/parser.py

@@ -64,7 +64,8 @@ def parse_ann_collection_name(collection_name):
 
 
 def search_params_parser(param):
-    """ parser params of search interface and return top_ks, nqs, nprobes"""
+    """ Parser params of search interface and return top_ks, nqs, nprobes"""
+
     # parse top-k, set default value if top-k not in param
     if "top_ks" not in param:
         top_ks = [10]