Update README.md

The Llama-3-Smaug-8B model is truly impressive! We would like to contribute by updating the README to include the base_model information. This is to address the missing details in the model card.

README.md

@@ -6,6 +6,8 @@ datasets:
 - microsoft/orca-math-word-problems-200k
 - m-a-p/CodeFeedback-Filtered-Instruction
 - anon8231489123/ShareGPT_Vicuna_unfiltered
+base_model:
+- meta-llama/Meta-Llama-3-8B-Instruct
 ---
 
 # Llama-3-Smaug-8B