Update README.md

Hello, I am truly impressed by the remarkable work done on the model. I would love to contribute by updating the base_model information in the README file. This addition would help fill the gap currently present in the model card. Thank you for considering my request!

README.md

@@ -8,6 +8,8 @@ datasets:
 - nlpai-lab/kullm-v2
 language:
 - ko
+base_model:
+- EleutherAI/polyglot-ko-5.8b
 ---
 # heegyu/polyglot-ko-5.8b-chat