fix finetune minicpm error

[jackyjinjing]

fix #578
fix #581

[RahulVadisetty91]

The second if statement should be properly indented to match the first if block’s level.

if input_ids.shape[-1] > max_length:
if ids.shape[-1] > max_length:
ids = ids[:max_length]
context = context[:max_length]
logger.warning(f"The input length ({input_ids.shape[-1]}) exceeds the model's maximum length ({max_length}), so it has been truncated")