update readme

Author: acc12649wd

README.md

@@ -52,3 +52,15 @@ python main.py --method=few_shot_cot --model=${model} --dataset=${dataset}
 # MultiArith and GSM8K are currently available.
 python main.py --method=few_shot --model=${model} --dataset=${dataset}
 ```
+
+## Citation
+```
+@inproceedings{NEURIPS2022_8bb0d291,
+ author = {Kojima, Takeshi and Gu, Shixiang (Shane) and Reid, Machel and Matsuo, Yutaka and Iwasawa, Yusuke},
+ booktitle = {Advances in Neural Information Processing Systems},
+ pages = {22199--22213},
+ title = {Large Language Models are Zero-Shot Reasoners},
+ volume = {35},
+ year = {2022}
+}
+```