[Bug]: UNIMO模型的resize_token_embeddings方法不会修改decoder的vocab_size，导致报错

[JasonCZH4]

软件环境

- paddlepaddle: 2.5.2
- paddlepaddle-gpu: 2.5.2
- paddlenlp: 2.8.0

重复问题

• [X] I have searched the existing issues

错误描述

UNIMO模型的resize_token_embeddings方法不会修改decoder的vocab_size，导致input_embeddings_size和output_embeddings_size没法对齐

稳定复现步骤 & 代码

tokenizer = UNIMOTokenizer.from_pretrained('./unimo-text-1.0-large')
model.resize_token_embeddings(len(tokenizer)) 
print(model.get_input_embeddings().weight.shape, model.lm_head.weight.shape)

[JasonCZH4]

GPT2模型也有类似问题，但是他已经被修复了，参考link，我使用类似方法修改unimo/modeling.py后可以修复，后续会提个PR。

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