Update readme_cn.md misspelling (#2088)

learningpro

2024-09-20 8c88d71f34ddf78588983538f887b8fb483996cd

 funasr/tokenizer/sentencepiece_tokenizer.py

@@ -49,3 +49,9 @@

    def get_vocab_size(self):
        return self.sp.GetPieceSize()

    def ids2tokens(self, *args, **kwargs):
        return self.decode(*args, **kwargs)

    def tokens2ids(self, *args, **kwargs):
        return self.encode(*args, **kwargs)