update itn_pipeline.md

chong.zhang

2023-05-05 8b3b594303fda83dba30770cb061334707460b04

 funasr/utils/timestamp_tools.py

@@ -19,7 +19,7 @@
                       sil_in_str=True
                       ):
    if not len(char_list):
        return []
        return "", []
    START_END_THRESHOLD = 5
    MAX_TOKEN_DURATION = 12
    TIME_RATE = 10.0 * 6 / 1000 / 3  #  3 times upsampled