fix typos in comments (#90)

@@ -70,8 +70,10 @@ def get_args():
     parser.add_argument(
         "--wave-filename",
         type=str,
-        help="""Path to the wave filename. Must be 16 kHz,
-        mono with 16-bit samples""",
+        help="""Path to the wave filename.
+        Should have a single channel with 16-bit samples.
+        It does not need to be 16kHz. It can have any sampling rate.
+        """,
     )
 
     return parser.parse_args()

@@ -23,8 +23,8 @@ https://github.com/k2-fsa/sherpa-onnx/blob/master/sherpa-onnx/csrc/online-websoc
 
 import argparse
 import asyncio
-import time
 import sys
+import time
 
 import numpy as np