"<image>" is absent in "llava_instruct_150k_zh.jsonl"

Hi,

I noticed that `llava_instruct_150k_zh.jsonl` is used in the [config](https://github.com/InternLM/xtuner/blob/main/xtuner/configs/llava/phi3_mini_4k_instruct_clip_vit_large_p14_336/finetune/llava_phi3_mini_4k_instruct_full_clip_vit_large_p14_336_full_e2_gpu8_internvl_finetune.py) that fine-tunes phi3-based llava using datasets from internvl. However, I found the special token `` is missing from this jsonl file. In the current llava pipeline, image embeddings won't be inserted into the input sequence of LLM if this special token is absent.