Evaluation Method for BIRD Dataset [Enhancement]

Hello,

I encountered an improvement opportunity during the evaluation process for the BIRD dataset. The prediction below is marked as incorrect by the evaluation method, but the only difference is the order of the elements.


The evaluation method uses strict equality. This occurs in the file [bird/llm/src/evaluation.py](https://github.com/AlibabaResearch/DAMO-ConvAI/blob/main/bird/llm/src/evaluation.py) on line 26.