update m2met2 docs

yhliang

2023-04-21 21114c2704db1a6d9633bd012a4320198eea62bd

 funasr/utils/postprocess_utils.py

@@ -225,7 +225,7 @@
                    ts_lists.append([begin, end])
                    begin = end
            else:
                raise ValueError('invalid character: {}'.format(ch))
                word_lists.append(ch)

    if time_stamp is not None: 
        word_lists, ts_lists = abbr_dispose(word_lists, ts_lists)