update readme

README.md

@@ -58,7 +58,7 @@ extracted_table = sequence.split("<s_answer>")[1].strip()
 ```
 
 ### Citation
-```
+```bibtex
 @misc{huang-etal-2023-do,
     title = "Do LVLMs Understand Charts? Analyzing and Correcting Factual Errors in Chart Captioning",
     author = "Huang, Kung-Hsiang  and
@@ -70,7 +70,8 @@ extracted_table = sequence.split("<s_answer>")[1].strip()
       Chang, Shih-Fu and
       Ji, Heng",
     year={2023},
+    eprint={2312.10160},
     archivePrefix={arXiv},
     primaryClass={cs.CL}
-}   
-```
+}    
+```